It will not be possible for every government in different countries who are adapting bitcoin are already eyeing on how to tax crypto. Other countries that regulated cryptocurrency has used the local exchanges where transaction fee is higher than other exchanges. It is because tax is already on it as an addition to the transaction fee being deducted every trade you made.
of course all countries want income from a trade, exchanging bitcoin is not yet in the trade category, but moving into a local bank will be charged one of them taxes, so exchanging bitcoin is not taxed but we will put our money into the bank before we take it in fiat money, of course, some governments have calculated the potential tax that can be used through local banks.