simply do your research and made your personal thought, is the only thing that i have learned
This is simpliest for a beginner but i have some other ways to share that actually i got some idea what is altcoin need to choose.. coinmarketap is one of the place where you can see all of altcoin in rankings.. most of altcoin that i choose is top 10 or top 20 depends if there is trending coin in top 20.. Those altcoin for me are worth it to buy and sell it in the right time..
The same thing I did here, before buying an altcoins...
I checked in the coinmarketcap which altcoins has a potential in the market...
I buy altcoins which is at lower price and sell it when I reach the profit what I want...
yes coinmarketcap can be our guide to choose what good coins to buy and we can see how much the price in many market exchange, beside that, we can have many clue to make our analyze for the coins, we can make prediction about the coins so we can buy when its in lower price.