you really can't generalize "crypto" like that. First of all, btc is more so a store of value rather than a currency, but also the most boring aspect of crypto in general. Money in the future will 100% be DLT based, since instant finality and complete transparency offer simply too many advantages. Money is already basically digital and ledger based, however just using a significantly more inefficient version than possible. The first iteration will likely be a CBDC, where China looks to be leading at the moment with the US however starting to realize the importance of the issue.
Furthermore, decentralized finance as it is currently built on defi basically allows for trustless financial interactions where you are still able to keep custody of your own money. The entire traditional financial system is currently being rebuilt there, in a trustless manner with the only real application still missing being undercollaterlized loans. And since basically every single currency in a decade will be a cryptocurrency, be it a CBDC or a decentralized one, permissioned bridges to access defi are easy to implement.
Can't really type out everything I want here since I would be stuck for hours, but my point is that trying to shoehorn crypto as a now $1.6T industry into the single usecase of alternative money is ludicrous in my eyes