I don't see any advantage over etfs. If it keeps going up the only theoretical advantage is not paying taxes when you self deport. But taxes is a small liability compared to the cance of it crashing. And tax burden is only significant if it actually doubles or triples
Selling your brokerage shares you can do even on the phone in Russia and transferring te money to your bank account. You just owe a tax bill at the end of the year. Your bitcoin wallet can also be robbed. Heard of that Italian guy getting robbed by fagots in manhattan?