Hi there,
Cryptocurrency can be profitable, however Bitcoin proper is probably not the best currency to invest in. The market of crypto is a little bit harder to predict but if you have either quality signals or you are able to monitor things regularly, it is a good investment. For low volume, crypto is probably not fantastic.
For a longer term investment, Crypto/Forex is never going to be a great idea however - you may want to look more towards a different type of portfolio for that.