How does one know which altcoins come out recently and thus are trading pretty good? You can check coinmarketcap to see which coin has increased in price or decreased in price the most in last 24 hours or 7 days or month etc. But besides that, are there sites that show what coins will be released soon to the public? Thus by that i mean being able to buy from exchange like binance etc.
I am not a big investor but I use Coinmarketcap and CoinGecko to check the volume price and activity of coins I've invested in and holding but the most important thing is you are a member of their telegram channel, and follow all their social media channel.