For me, i think there are no advantages or disadvantages in choosing to trade forex or crypto over the other, it's all a matter of choice and preferences, like myself, i started trading forex before i discovered crypto, and after a while in crypto, i started trading and left forex, not because forex is bad in any way, but simply because i came to like and prefer trading crypto over forex.
There are people who like trading forex and no matter what, they will never leave forex to trade crypto, and there are those as well who will not leave crypto to trade forex, it's all about personal choice, but for me, i just prefer trading crypto, most especially, spot trading because, i have the option of holding a coin i bought for a longer time incase its price did not go as i expected, at least, until the price moves up for me to sell in profit, this is completely different from forex where a loss is a loss, most especially, if you are using a very high leverage, like it is in futures market in crypto.
Yes, it is a matter of choice but we can't erase the fact that there is still a disadvantage whatever we choose between the two. For crypto, it was volatility for some but for others, there is more than it, as they don't consider volatility as a disadvantage, rather they consider it as an advantage because this is where they can buy low and sell high.
Now about forex, I think it's lack of volatility for some, but others like it because they think it is less risky while at the same time they can earn a profit stable in manner. Before crypto came, there is already a forex and I'm also aware with it but I haven't tried it. I only tried crypto and I'm happy and contented with it already. There is no need for me to try forex.