Hm. There are some things that banks do then that math can't do. But advanced cryptocurrencies have smart contracts that allow DeFi systems to handle many typic

Hm. There are some things that banks do then that math can't do. But advanced cryptocurrencies have smart contracts that allow DeFi systems to handle many typical banking functions. The primary things that people use them for, to store money or sometimes distribute it, or act as a system of record, have been made obsolete though.