I would say 60% for succeed and 40% for failed on crypto currency thats my personal opinion. Many bitcoin holder or other currency those 60 percent know how to trade and have knowledge in trading crypto currencies but those 40 are those beginners and lossers. But it takes time to be successful in this field you must know all the techniques and strat before investing or trading .
I don't think we can give such percentage here because the question of the OP is too hard to come up with numbers. Why do you think it is 60%, not 50 or 70 or 80? We have no basis in the percentage assumption. Also, most traders lost some, win some. So how can you really tell if the user succeeded? Just because of his holdings? So this one is very subjective. No one can give you a concrete answer on this one.