Bitcoin (BTC-USD) has hit another record high, currently sitting at $38.4K. One week ago, it had never been above $30K. A number of altcoins have had even bigger rallies, led by Ether (ETH-USD), whose price has doubled since Christmas (but still hasn't surpassed its record of three years ago).The total value of all cryptocurrencies has now topped $1T vs. $760B at the previous market top in late 2017. Bitcoin accounts for the majority of this with a current market cap just north of $700B, and Ethereum's market cap is $138B.Sitting in high cotton is CME Group (CME), whose open interest in bitcoin futures of $2.1B is tops among exchanges. Total global open interest is $11B vs $3B one year ago.PayPal (PYPL) is adding to its crypto bet with an investment in Utah-based Taxbit - a company helping crypto users figure out taxes on their holdings. Other investors in Taxbit include