I don't think so, because a few types of coins are real, and maximum coins have many problems, such as difficult to sale, difficult to convert from coins to money. Personally, I just believe in real cash. Honestly,
Your point is good but sometime this can give you good profit for this you have to do some work because every thing need some good intention for better result if you can give some time and effort then surely you can take some good profit and never keep all money in this try to have cashout after having profit because its very unpredictable market and any movement can give you some serious shock.