X0206 3 2025-09-29 0 0002042292 BTC Development Corp. BDCI 0002086247 BTC Development Advisors LLC 2929 ARCH STREET, SUITE 1703 PHILADELPHIA PA 19104 true Class B Ordinary Shares Class A Ordinary Shares 4095833 D The reporting persons disclaim beneficial ownership of these securities, except to the extent of its pecuniary interest therein, and this report shall not be deemed an admission that a reporting person is the beneficial owner of such securities for any other purpose. The Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the issuer's business combination, or at any time and from time to time at the option of the holder, on a one-for-one basis, subject to certain adjustments described in the issuer's charter documents, and have no expiration date. Includes up to 550,000 shares that are subject to forfeiture in the event the underwriters of the issuer's initial public offering do not exercise their over-allotment option in full. Exhibit 24 - Power of Attorney /s/ R. Maxwell Smeal 2025-09-30