...
Spread your investment - do some cloud mining, some home mining, invest in a promising exchange / crypto related startup / ICO , Invest in some established coins like BTC, ETH, LTC and invest in some
...
"Put All Your Eggs in One Basket, and Then Watch That Basket"- Carnegie, around 1902
In any case, it is much more sensible to focus on what you know best and what you do best.