The inversion of monetary control is the biggest reason my mind boggles that governments haven't clamped down harder.
The only explanation I can come up with is that institutional banking / government regulation is so stodgy that they haven't played out the decade+ repercussions.
Because after viable value is established, it's going to be a hard genie to put back in the bottle.
It's much harder to make something that appears to have value, not. Than it is to keep something that appears to not have value, not having value.