I guess if you invest just one coin or Bitcoin Ethereum were probably very safe. And certainly, an asset of your coins will continue to evolve even can benefit greatly. But this process is very long because you have to keep your coins for the long term. If you do trade short term would certainly be more difficult to earn a profit.
That is a good suggest, but it's hard for a little investor. Because with 500$, and you just hold BCT, and ETH, it don't help you make a huge profit.