Make sure to always do extensive research on every cryptocurrency you intend to invest in. Read through the white paper, look for a legitimate team, and make sure that coin or token is working to resolve a real-world issue. I found steem and cardano before they were in the top 80 because of research and was able to purchase cardano at about 8 cents per coin. Now it is expected to be in the top 3 by the end of the year.