Investing on banks me be much more secured for me but investing in bitcoins will probably going to give you much huge profit. But bitcoins, you might find it scam especially when you decided to invest on icos so I'm going to say that, just buy bitcoins and hold it that is going to be much safer. But ypu can always invest on both to play safe, because nothings going to lose if you invest in them both because these will probably going to give you profits