If only the cryptocurrency profits are taxed, just declare losses instead of profits. 
Maybe you should talk to a Brazilian accountant, who has deep understanding over the Brazilian tax system. I'm sure that many accountants around the world know how to use loopholes in the local tax legislation in order to help their clients pay less taxes in a legal way. There aren't many accountants in this forum, so you won't get any expert opinion. I don't think that moving your crypto from one wallet to another would help you that much.
Maybe you should talk to a Brazilian accountant, who has deep understanding over the Brazilian tax system. I'm sure that many accountants around the world know how to use loopholes in the local tax legislation in order to help their clients pay less taxes in a legal way. There aren't many accountants in this forum, so you won't get any expert opinion. I don't think that moving your crypto from one wallet to another would help you that much.I too think that wouldn't be a solution.
And, anyways, if an accountant is good, then his cost for the help and clear path to go around taxes would be much better in long-term than to try to fool the system by yourself