Both are good as long as you have knowledge about them and understand how to read all the trends related to crypto or forex. Because basically everyone will only trade on what they understand properly and what they have mastered well so in essence they will only choose what is easier for them when they want to trade. And you also don't need to think complicatedly about this because trading is a very common thing now so you can trade anywhere as long as you are able to make money, be it in the traditional market, the crypto market or the forex market.