Many cryptocurrencies are available in the market for scamming users. They often run multiple presale events and, once they receive investments, they disappear with people's money. Then, they start a new project under a different name to scam again. These actions are unfair to crypto users.
Yeah, that's so true because thousands of coins are listed on the Coinmarketcap or Coingecko but i think top 100-500 coins still surviving on the market others most of the coins seems dead, because there are many coins are getting listed on the market then the old coins lost their position. But pre sale era ended back in 2017. Now people's will never make a investment without research, especially now no one will put money in the unknown project.