Parataxis Holdings announces a merger with SilverBox Corp IV SPAC, planning to raise up to $640 million for the establishment of a Bitcoin treasury company listed on the New York Stock Exchange. The transaction includes up to $240 million of SPAC funds (subject to shareholder redemption), of which $31 million will be immediately used to purchase Bitcoin, while a stock purchase agreement has been signed allowing it to issue and sell up to $400 million in equity. (The Block)