In my country you only are obligated to pay 18% tax from your income, whether it was from cryptocurrencies or anything else. This tax is to high though in my opinion and makes a lot of people move out.
It is important here that states do not set too high tax rates, otherwise they risk driving the currency into the shadows and the state will not receive the amount in taxes that it could receive when establishing a minimum tax rate.
So, for example, now in the news section the topic is discussed that in Ukraine can impose a tax of 19.5 percent of profits in the crypto currency. And the government wants to introduce such a tax even before the adoption of the relevant laws on the regulation of the crypto currency. As one of the four draft laws submitted to the legislative body of the country, is the introduction of a five percent tax. I am sure that if this law is adopted, the state will be able to raise much more money than the one that provides a tax of 19.5 percent. If the tax is five percent. there will be no sense in avoiding paying it, it will be easier to pay and not have problems. But a tax of 19.5 percent is unlikely to be paid by many.