Odaily Planet Daily News Thumzup Media Corporation (NASDAQ: TZUP) today announced that its board has authorized the company to hold up to $250 million in cryptocurrency assets, covering the following currencies: Bitcoin (BTC), Ethereum (ETH), Solana (SOL), Ripple (XRP), Dogecoin (DOGE), Litecoin (LTC), and stablecoin USDC. (PR Newswire) Previously reported, Donald Trump's eldest son invested in the social media company Thumzup which holds cryptocurrency reserves.