I sold ETH at the price of $100 in 2018, ETH goes up to $600 if I kept it my asset has increased 6 times. That is my biggest regret.
In what month did you sell Ethereum in 2018? because as far as I remember the highest Ethereum price occurred in 2018, even though in the middle of that year Ethereum also experienced a very large decline again, so I am a little surprised when you say selling Ethereum for $ 100 in that year, because in the year before that Ethereum had already exceeded $ 100.