This person is a Call selling Doomsday ETH, and the option has been profitable for 4 years, but this wave has returned to zero. Similar to the stupid strategy that I think will make money without any problems and then return to zero, there are also grid, Martin, statistical arbitrage, etc The dumbest and most foolish thing is to develop an improved grid on my own. I feel like I'm going against the tide, and when I go out to raise funds, I say I've come up with a really amazing arbitrage strategy. I've seen at least two figures of this kind of idiot.