If I have $10 USD with me to invest into BTC/IOTA markets then I would prefer splitting my balance and try investing for long term as well as short term. I would choose BTC for long term investment whereas IOTA for short term to make some instant profits out of the graph.

There are indeed a lot more options to invest into the cryptocurrencies which may include ETH, Waves, etc which also has the potential to make higher volume markets ahead. Depending on the market growth, I would invest into some of these coins to hold for some interval adjusting the stop-loss each week. Investment in any coin can give us profit, but just we need to know when to buy.