I think the popular coins are almost the same as before in the top 10 coins. Bitcoin is still the most popular coin and Ethereum is the most popular altcoin.
it depends on what aspect we look at it. trading volume, price increase, or from the rating given by the site. many aspects that we can see to determine the current popular coins. if you look at coinmarketcap maybe the top 10 are the best assets.
but some new coins that are not yet registered with CMC also have good market potential and appeal. like ONE and BTT coins.