If folks are making the argument that risky speculative investments can be used as currency for day-to-day purchases, that’s an argument I’d hear out, but I feel like it would be a difficult argument to make.

And for the record, the argument I’m perceiving from you (“crypto is a speculative investment, invest carefully, enjoy it if you win”) is the closest to reality of all of these arguments IMO. But I do also believe that highly speculative things like this make for bad day-to-day currencies, and have not yet been convinced otherwise.