Which is yet another illusory choice, as it will functionally work the same way. They find it appropriate for a currency to derive its value from the securitization of human life, with the bodies and average lifetime earnings of each citizen being used as collateral to hypothicate the printing of money from thin air. They're literally leveraging our future to fund the present. Biologically-based crypto seems like the preferred option, at least ultimately. They keep multiple options on the table to give the impression of competition.