Odaily News Nasdaq-listed Thumzup Media Corporation announced that it will use Coinbase Prime as a Bitcoin custodian and prime broker. The company also disclosed that it held 19.106 Bitcoins as of May 12, with a market value of approximately $2 million. Previously, Thumzup had announced that it plans to increase the maximum total issuance amount to $500 million to acquire more Bitcoin. (Prnewswire)