The main difference between these "shit coins" and fiat is once the shit coin scammers eventually pull the rug, they cannot just print more of that coin. Fiat scammers can just print more of that currency.
But in both situations one does need to look at the economics of the coins, and the priors of the people in control.
Big talk. But, the thing with stochastic terrorism is you don't know where the threat is coming from. It could be your neighbour, or the person across the street. It could be the person you pass on your way to work, or the shops. They could come in singles or in multitudes. Personally, I don't blame the officials for not wanting any part of it.