Coinmarketcap is the best place to watch and learn about the top trending and most famous coins. At the moment market is red and most coins are at the bottom so the best time to buy and hold some good coins.
That's clear, but if you want to learn and watch about coins, then not only on coinmarketcap, but on coiningecko you can also do it because the site is also almost the same as coinmarketcap although there are new features that can differentiate the two.