I found lot of traders who bought a special coin from many exchange site. Then few months they go for sleep and wake up after 5 years. So now what about your trade?
As much as possible better to buy coins that are listed at the coinmarketcap especially an altcoin which is listed at the top 30 coins in cryptocurrency. In this tactic there is a big chances for you to earn, though we can't measure how much, just for what I am sure is 100% you can definitely get profit due to the coins are all potentials and build a strong community traders too.