This might take a few tweets to get out.
1/ The ICO boom in 2017 and the altszn in early 2018 were unique in that crypto was a largely unregulated space where countless fools were getting lucky on the bad luck of greater fools. This was largely fueled by Ethereum and the ability 2/ to create tokens and contracts from thin air but it got thrust from the post halving BTC bull market and the unique phenomenon of 'crypto kitties' which were both like booster rockets and drew huge media attention to the entire crypto space