[Glyptodon]

In all fairness a money market cash position is basically accepting central bank interest while you decide what actual investment you want to put your money in.

People use it as part of an allocation, sure, but nobody plans to retire with interest from a checking account, which is pretty much what you'd be doing if you invest in a money market fund.

You may have a point that since fiat currency has no inherent value compared to physical commodities there's no reason that the right crypto couldn't function as a fiat currency, which seem true. But if crypto were fit for use as a fiat currency, you wouldn't expect it to be an investment at all - at least no compared to stocks, bonds, etc.