I doubt if your above statement can be verified to be accurate. I have done both (invested in cryptocurrency and traded forex). In forex trading, with the right tools and understanding of the market, the forex market is on another level and won't be reasonable comparing it to that of bitcoin. The risk are less as it's heavily regulated. What make forex superior(in my opinion) is that the market capitalization is very high and you can make profit irrespective of the price movement of the market but that can't be achieved trading cryptocurrency.

Cryptocurrency on the other hand offers the privilege to keep holding onto your investment when your prediction doesn't favor you. With forex, if you predict wrongly you loss all you miney but in cryptocurrency you only lose when you sell.