USE COINMARKETCAP
Coinmarketcap is a website you can use to check on all the current crypto currencies. It lists them out by current market cap and has information such as; circulating supply, total market cap, 24h change, info on where to buy the currency and much more. If you are new to crypto and simply want to invest then look at the top 10 or top 20 coins, research the project and make your own decision. If you are trading then you may want to dig a little deeper into each project