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.
I agree sir, @Rehan Zakir revealed that the fraud that occurred because after the initial seller did not enter the exchange so that the money spent had not returned capital, with the excuse of waiting for the roadmap to run,

but I realize that the developer does not force and only offers even though the benefits offered in multiplying the value of the token.
@mdzahed134 that's right sir, you mentioned that the life of the coin after listing and indeed the price tracker is useful, there is no guarantee that a coin will survive even after listing, because many transactions occur from communities that need each other including coins that are needed for airdrop hunting and accidentally glance at the broad market share.
I usually monitor the project's twitter for further impressions, because nowadays there are many big devs that are supported by certain cexes or certain chains, that's where I just started looking, there are also many new projects that hold events even without presale, of course it's free

, and when entering in cmc or coin gecko etc. other than price reputation order 1-50 I sell (if it is already listed on the exchange) when the price is high, I consider it capital for scalping when the price is bearish.