What are the top 3 coins in the market?
Right now, the top 3 coins are btc, ethereum and bitcoin cash based on marketcap according to coinmarketcap. It changes from time to time though depending on what is gaining and losing dominance in market. To be always updated, just go to the website of coinmarketcap, it is always updated real time. If you are looking for top 3 coins based on trading volume and others you can also go there, they have a list for that.