what is going to be the cheapest cryptocurrency to invest at present and get double future return from it? 
If i see in the coinmarketcap, the progress of the coin which cheaper rather than btc or eth but has good value and always increase without depend on bitcoin's decrease is WAVES. For few times, the price of WAVES is always increase not spesific or drastic increase, but i think it will be increase more than now and this coin has bright future. Nowadays, the price of WAVES only $1,96 but its listed in top 40 cryptocurrencies by market capitalization.