Both trading and forex are something that need to be studied both fundamentally and technically, so I think it should be based on what someone wishes to do because these two both have risk, so you can recommend it to someone to do it. I feel like it should be something of choice, and if you can be able to teach the person then you can, but don’t recommend it to anyone regardless. I feel like it may be a problem after the person realises the whole risk in trading and he may not be able to do it. 

But if I have to choose for myself, I will choose crypto trading over trading forex because of the risk and some personal reasons.