Started with 100 euro 3 years ago, at the moment at least 20x. You have to start somewhere 
Indeed, you have to start from somewhere whether it is $100 or $200, and if you have small investments in the crypto currency than you have the room to learn large from that with equal ratio of the profit. The best thing about small investment is that even if you loose, you loose small amount and that gives you a chance to play with all of your knowledge to strike for maximum profits. Definitely, it is ok for the start, but you need to be comfortable to lose it.
Even though with holding it is hard to lose money in crypto unless you are unlucky and invested in some really bad project.