Domain flipping? Really depends, I mean this is a niche but it is really affected by how the price really moves. So I guess today's price is really good to purchase domain names related to crypto and then wait for the right time before everything gets hot again and try to resell than domain. However, it doesn't mean that you will get buyers ASAP, its all about the timing and the price of the domain plus the name so sometimes if you get hit the jackpot but most of the time you have to wait for the perfect buyer.