hello @lupafilotaxia,
this fall of the market affects the income of that country who lost a lot of money with this fall, but one of the doubts I always think is that coins can work perfectly well as an exchangeable digital asset. it is not necessary for the government to get involved in all this matter, governments only want a part of the profits, that is why they dictate complex legal frameworks where the purpose is to stop the growth and adoption of coins as a payment system.