Taxation should not be attributed to losses. They vseravno we have to pay, we want it or not. In order for the crypto currency to be accepted by the state, we will have to do it. Otherwise, the state will introduce various restrictions on the crypto currency. It will be even worse. However, I admit the possibility of concealing in some cases some operations from taxation, when they obviously can not be taken into account by the state. However, in general, for the whole mechanism to work, taxes should be paid.