Scams and corruption are one thing, exponentially growing pyramid schemes are another. If you are a market regulator who don't have the resources to go after all the wrongdoings, going after the >$1B pyramid schemes are your priority.
Some countries like Albania had very damaging scams that implied a sizeable percentage of their economy.
The CCP cares about population destabilization and independence movements above all things. Economic control starting at the provincial level up through the CCP is job 1. The CCP is very watchful over their provincial governors getting too much power and alternative currencies offer them a potential way for provinces to exploit their local power.