Most of the forum participants do not even know about the existence of Forex, and the decision to trade cryptocurrency is the only solution for them. As for me, I left Forex at a time when cryptocurrency trading was not yet available there.
Yes that is the situation in the past though. I think things are changing and the awareness is increasing now with trading forex here unlike few years ago.
Anyways, in relation to what OP asked, I think both crypto and forex are risky and having same trading pattern but one thing that is challenging in forex trading is manipulation that looks more than what you observe in crypto. This manipulation is frustrating and most times comes through fundamental which is news feed that can suddenly change the trend and direction of the market. But if you are trading decentralised coins, you will hardly feel manipulation.