The profits from business with crypto are huge. If a forex trader takes 1 week to make 5-10% profit, with crypto they can earn up to 50-100% in just a few days or a week. That means better returns in the same time. In addition, crypto is not just a currency, it's a technology product.
The returns are great if you invest in the right currency, there are many shit coins in the market and there are many who lost their money because of that, forex is not a high risk market while crypto is a high risk high volatile market and if you are willing to take a risk to invest in any other coin other than bitcoin then the risk will multiply hundred times.