That's kind of what I've been doing, tossing $20 into everything that has at least some trade volume on Bittrex. However my perspective is that there is no way so many cryptocurrencies are going to go mainstream, they are still complicated and enough people arn't even ever going to use Bitcoin. There also has to be some intrinsic value of use. Why is everyone going to waste their time switching to the next crypto currency that comes out every month ? What applicable value does the crypto currency have ? Is it being implimented by a bank or some stupid chat program ? Basically what's the value of the entity or asset that issues it.