I usually advise my friends not to invest on a single coin but I have done the exact opposite. I invested my remaining money on Ethetreum because of the low price and the high posibility of price inceease. I hope that it's worst the tisk as it was the last time that I will do it. If the $1200 will be split on invested I will buy ETH, XRP and TRON.
In any case, I consider ethereum the most profitable investment lately. The fact is that confidence in the erc20 protocol is very high. Nevertheless, in the portfolio you need to have about 10 different coins, and you can, for example, offer another stellar.