FRED now has crypto data
Via David Siegel:
Not much, but it’s a start. The individual series are:
Coinbase Index https://fred.stlouisfed.org/
series/CBCCIND Coinbase Bitcoin https://fred.stlouisfed.org/
series/CBBTCUSD Coinbase Bitcoin Cash https://fred.stlouisfed.org/
series/CBBCHUSD Coinbase Ethereum https://fred.stlouisfed.org/
series/CBETHUSD Coinbase Litecoin https://fred.stlouisfed.org/
series/CBLTCUSD