BTC is associated with too much risk. I'd advise you to go for ETH, as its resilience and stability have proven themselves. Additionally, you might want to consider Initial Coin Offerings, along with the ETH, to boost up your profitability even more (note, however, that you need to be cautious about your choices, as there are many scams out there). You might want to consider smaller projects as the risk involved with them isn't that high (such can be Cointed, Giftz, ATF, Knowledge, etc.)