Virginia transaction attorney shares how to write an effective and legally binding business purchase agreement. Investing in crypto can be lucrative.Use our cryptocurrency purchase agreement to outline your contract with a crypto broker and simplify the process. Sell Agreement (BSA) is a lifetime contract providing for the transfer of a business interest upon the occurrence of one or more triggering events. This Agreement of Purchase and Sale (this "Agreement") is made as of this ____ day of. Frost law's cryptocurrency tax attorneys and CPAs can help you properly file your short-term and long-term capital gains in your tax returns.