Description of Registrants Securities

Exhibit 4.5

DESCRIPTION OF SECURITIES REGISTERED UNDER SECTION 12 OF THE SECURITIES

EXCHANGE ACT OF 1934

The following is a summary of the rights of the common units of fractional undivided beneficial interest (the “Shares”) of Grayscale Bitcoin Trust (BTC) (the “Trust”), which is the only class of securities of the Trust that is registered under Section 12 of the Securities Exchange Act of 1934 (the “Exchange Act”). The description is intended as a summary, and is qualified in its entirety by reference to the Sixth Amended and Restated Declaration of Trust and Trust Agreement, as amended by Amendment No. 1 thereto, copies of which have been filed as exhibits to this annual report on Form 10-K. Terms used but not defined herein have the meaning set forth in the Glossary of Terms in the Trust’s Annual Report on Form 10-K for the year ended December 31, 2023, of which this exhibit is a part.

General

The Trust operates pursuant to the Sixth Amended and Restated Declaration of Trust and Trust Agreement between Delaware Trust Company (formerly known as CSC Trust Company of Delaware), a Delaware trust company and Delaware trustee of the Trust (the “Trustee”) and Grayscale Investments, LLC (the “Sponsor”), as amended by Amendment No. 1 thereto and as the same may be amended from time to time (as so amended, the “Trust Agreement”). Under the Trust Agreement, the Trust is authorized to create and issue an unlimited number of Shares. Shares will be issued only in Baskets (a Basket equals a block of 10,000 Shares) in connection with creations. The Shares represent units of fractional undivided beneficial interest in and ownership of the Trust and have no par value. The Shares are quoted on NYSE Arca under the ticker symbol “GBTC.”

Description of Limited Rights

The Shares do not represent a traditional investment and should not be viewed as similar to “shares” of a corporation operating a business enterprise with management and a board of directors. A shareholder will not have the statutory rights normally associated with the ownership of shares of a corporation. Each Share is transferable, is fully paid and non-assessable and entitles the holder to vote on the limited matters upon which shareholders may vote under the Trust Agreement. For example, shareholders do not have the right to elect or remove directors and will not receive dividends. The Shares do not entitle their holders to any conversion or pre-emptive rights or, except as discussed below, any redemption rights or rights to distributions.

Voting and Approvals

The shareholders take no part in the management or control of the Trust. Under the Trust Agreement, shareholders have limited voting rights. For example, in the event that the Sponsor withdraws, a majority of the shareholders may elect and appoint a successor sponsor to carry out the affairs of the Trust. In addition, no amendments to the Trust Agreement that materially adversely affect the interests of shareholders may be made without the vote of at least a majority (over 50%) of the then-outstanding Shares (not including any Shares held by the Sponsor or its affiliates); provided, however, that a shareholder shall be deemed to consent to a modification or amendment of the Trust Agreement if the Sponsor has notified such shareholder in writing of the proposed modification or amendment and such shareholder has not, within twenty (20) calendar days of such notice, notified the Sponsor in writing that such shareholder objects to such modification or amendment. Additionally, subject to certain limitations, the Sponsor may make any other amendments to the Trust Agreement which do not materially adversely affect the interests of the shareholders in its sole discretion without shareholder consent.

Derivative Actions

Under Delaware law, a shareholder may bring a derivative action if the shareholder is a shareholder at the time the action is brought and either (i) was a shareholder at the time of the transaction at issue or (ii) acquired the status of shareholder by operation of law or the Trust’s governing instrument from a person who was a shareholder at the time of the transaction at issue. Additionally, Section 3816(e) of the Delaware Statutory Trust Act specifically

provides that “a beneficial owner’s right to bring a derivative action may be subject to such additional standards and restrictions, if any, as are set forth in the governing instrument of the statutory trust, including, without limitation, the requirement that beneficial owners owning a specified beneficial interest in the statutory trust join in the bringing of the derivative action.” In addition to the requirements of applicable law, Section 7.4 of the Trust Agreement provides that no Shareholder will have the right, power or authority to bring or maintain a derivative action, suit or other proceeding on behalf of the Trust unless two or more Shareholders who (i) are not affiliates of one another and (ii) collectively hold at least 10.0% of the outstanding Shares join in the bringing or maintaining of such action, suit or other proceeding. The Trust selected the 10.0% ownership threshold because the Trust believed that this was a threshold that investors would be comfortable with based on market precedent.

This provision applies to any derivative action brought in the name of the Trust other than claims brought under the federal securities laws or the rules and regulations thereunder, to which Section 7.4 does not apply. Due to this additional requirement, a Shareholder attempting to bring a derivative action in the name of the Trust will be required to locate other Shareholders with which it is not affiliated and that have sufficient Shares to meet the 10.0% threshold based on the number of Shares outstanding on the date the claim is brought and thereafter throughout the duration of the action, suit or proceeding.

Redemptions and Distributions

Through its redemption program, the Trust may redeem Shares from Authorized Participants on an ongoing basis. Although the Trust redeems Baskets only by distributing Bitcoins, at this time an Authorized Participant can only submit Cash Orders, pursuant to which the Authorized Participant will accept cash from the Cash Account in connection with the redemption of Baskets. Cash Orders will be facilitated by the Transfer Agent and Grayscale Investments, LLC, acting other than in its capacity as Sponsor, which will engage one or more Liquidity Providers that is not an agent of, or otherwise acting on behalf of, any Authorized Participant receiving Bitcoin in connection with such orders. Subject to In-Kind Regulatory Approval, in the future the Trust may also redeem Baskets via In-Kind Orders, pursuant to which an Authorized Participant or its AP Designee would receive Bitcoin directly from the Trust. However, because In-Kind Regulatory Approval has not been obtained, at this time Baskets will not be redeemed through In-Kind Orders and will only be redeemed through Cash Orders. Pursuant to the terms of the Trust Agreement, the Trust may make distributions on the Shares in cash or in-kind.

In addition, if the Trust is terminated and liquidated, the Sponsor will distribute to the shareholders any amounts of the cash proceeds of the liquidation remaining after the satisfaction of all outstanding liabilities of the Trust and the establishment of reserves for applicable taxes, other governmental charges and contingent or future liabilities as the Sponsor will determine. See “Item 1. Business—Description of the Trust Agreement—The Trustee—Termination of the Trust” in the Trust’s Annual Report on Form 10-K, of which this exhibit is a part. Shareholders of record on the record date fixed by the Transfer Agent for a distribution will be entitled to receive their pro rata portions of any distribution.

Creation of Shares

The Trust creates Shares at such times and for such periods as determined by the Sponsor, but only in one or more whole Baskets. A Basket equals 10,000 Shares. See “Item 1. Business—Description of Creation and Redemption of Shares” in the Trust’s Annual Report on Form 10-K, of which this exhibit is a part. The creation of a Basket requires the delivery to the Trust of the number of Bitcoins represented by one Share immediately prior to such creation multiplied by 10,000. The Trust may from time to time halt creations, including for extended periods of time, for a variety of reasons, including in connection with forks, airdrops and other similar occurrences.

Redemption of Shares

On January 10, 2024, the SEC approved an application under Rule 19b 4 of the Securities Exchange Act of 1934, as amended, by NYSE Arca to list the Shares of the Trust. Shares of the Trust began trading on NYSE Arca under the symbol “GBTC” on January 11, 2024. In connection with the uplisting of the Shares, the Sponsor authorized the commencement of the Trust’s redemption program in reliance on Regulation M exemptive relief available to similarly situated commodity-based exchange traded products.

The Trust redeems Shares at such times and for such periods as determined by the Sponsor, but only in one or more whole Baskets. A Basket equals 10,000 Shares. As of December 31, 2023, each Share represented approximately 0.0009 of one Bitcoin. See “Item 1. Business—Description of Creation and Redemption of Shares” in the Trust’s Annual Report on Form 10-K, of which this exhibit is a part. The procedures by which an Authorized Participant can redeem one or more Baskets mirror the procedures for the creation of Baskets. The redemption of a Basket requires the delivery to the Authorized Participant of the number of Bitcoins represented by one Share immediately prior to such redemption multiplied by 10,000. The Trust may from time to time halt redemptions, including for extended periods of time, for a variety of reasons, including in connection with forks, airdrops and other similar occurrences.

The Sponsor may suspend the Trust’s redemption program in its sole discretion, or the redemption program may otherwise become unavailable, which could cause the Shares to trade at a discount to the NAV per Share. See “Risk Factors—Risk Factors Related to the Offering—Any suspension or other unavailability of the Trust’s redemption program may cause the Shares to trade at a discount to the NAV per Share” in the Trust’s Annual Report on Form 10-K, of which this exhibit is a part.

Book-Entry Form

Shares are held primarily in book-entry form by the Transfer Agent. The Sponsor or its delegate will direct the Transfer Agent to credit the number of Creation Baskets to the applicable Authorized Participant. The Transfer Agent will issue Creation Baskets. Transfers will be made in accordance with standard securities industry practice. The Sponsor may cause the Trust to issue Shares in certificated form in limited circumstances in its sole discretion.

Share Splits

In its discretion, the Sponsor may direct the Transfer Agent to declare a split or reverse split in the number of Shares outstanding and to make a corresponding change in the number of Shares constituting a Basket. For example, if the Sponsor believes that the per Share price in the secondary market for Shares has risen or fallen outside a desirable trading price range, it may declare such a split or reverse split.