Calling them a “currency” wouldn’t be accurate either.
And the fact that they still exist as a fraction of a shadow of their former hype doesn’t perish the fact that they have accomplished none of their stated goals.
Not as an untracable currency, not as a store of value, not as a medium of exchange, and most especially not as a thing to make government-issued money obsolete.
Cryptocurrency as a whole isn’t worth the disk space it occupies.