It all depends on the country where you are, the rules vary a lot. But personally I like to buy / sell online more since it is much safer, I remember that 2 years ago I think that when BTC was reaching its historical maximum I sold 1 BTC for 15K USD and when I left the mall some guys robbed me and took my money. money obviously I'm sure it was in complicity with the person who bought my BTC, but in my country, just as there are no laws that go against the sale of BTC, there are no laws that go against the theft of BTC: D so it's kind of screwed up.