
Just ban all crypto currencies.
Your stock market will stabilize as it's no longer being used by those whom manipulate crypto currencies for their own enrichment. Your economy will settle down as citizens no longer have to worry about how, when, why, nor even if to begin accepting crypto currencies in addition to nor instead of actual fiat currencies. Best of all is the fact that your country will be seen as inhospitable to the use of crypto currencies which will have a knock on affect of making nobody want to start a crypto currency mining operation there either, meaning you won't end up like Ireland which is currently having to order it's power generating grid to prioritize everything _other_ than such massive power drawing enterprises lest the entire nation suffer rolling blackouts due to an inability to deliver the terawatts demanded by such entities. Just nip that migraine inducing pain in the arse right here, right now, and save yourselves a ton of ever greater pains in the future...