At coinmarketcap, we can see over 5000 altcoins officially listed. But surely more than 80% of the altcoins there died and became scams, with too many weak projects and scams causing the market to collapse as it is today. Even in 2019, I see a few projects in the top 100 that have become scams, like QKC, CMT ... In 2020, I hope the market will only have about 200 altcoins active. At that time, investors will focus on quality altcoins and help the price go up
And you need to think about the following, those are the coins that made it, those are the coins that are big enough to be listed by such websites, there are many other coins that tried to get there and failed and their project died really quickly, so most likely at any given day there are probably a number of coins that double that amount, meaning the situation in the market is many times worse than we imagine and even if I want that most of those coins disappear this is never going to change since scammers are still getting profits with their bad projects.