In my opinion, you want to buy/mine a coin that has yet to be widely discovered.

Once the media and the whole world has jumped in, there will be less upside potential. The trick is to find the coin before the massive run up in price.

How to find the next winner:

Take a look at the list of coins on coinmarketcap.com and look for those that are undervalued. The trick is to find coins that have a disconnect between underlying fundamentals and market price. Do your homework and realize that coin value is derived from; coin name, size and quality of community, and developer genius.

Then read, study, and research, and find the coins that the markets have not yet found.