You move to stable coin to retain your fiat value genius.. when you want to use it to fund something then you exchange it to fiat of btc or eth or whatever... If you leave your eth you just lost over 90% of what you contributed.. Only morons would leave all of their ico money in crypto. It's call business management.. All those ico's that won't make it did exactly that they did not sell a portion of their eth into fiat so now they have jack to show for and can't keep on developing..