Sell Agreement (BSA) is a lifetime contract providing for the transfer of a business interest upon the occurrence of one or more triggering events. If you buy a cryptocurrency and then sell it once it increases in value, you must pay capital gains tax.Virginia transaction attorney shares how to write an effective and legally binding business purchase agreement. This handy guide will give you a complete statebystate breakdown of cryptocurrency sales and use tax laws and regulations. This notice does not constitute an offer to sell but invites interested parties to submit a bid for purchase. The following information is being provided. Investing in crypto can be lucrative. Use our cryptocurrency purchase agreement to outline your contract with a crypto broker and simplify the process.