A similar question has been asked and answered a year ago. Refer to this - https://bitcointalk.org/index.php?topic=5450047.0

Which is better depends on many factors
Interest - I am more interested in crypto trading than in trading forex. So definitely crypto for me.

Secondly, crypto is easier as I can even decide not to trade and hold and when the value appreciates I make money. In forex, you must trade and that's it. There's no holding.

Lastly, I will say not to limit yourself. You can learn both and do both if that's what you want. Despite being similar they have their own unique differences that stands them out.