Yes, this is the world of the crypto industry, where there are projects that are like trash that end up being shit projects, scams. And you are right, in fact, many altcoins died after listing on several exchanges, initially experiencing a decrease in volume, market cap, and liquidity, then they were also delisted from the exchanges. Until finally they become dead coins.
It may not be easy to find which projects will last a long time and which are short-lived projects. But at least, stay away from projects that only rise because of the hype, this is very, very dangerous and high risk.
Worse shit. I have invested in a project that never made it to an exchange and the team just deleted its social media accounts. If I have kept the ETH back in 2018, it is worth 5x today. Newbie or not could potentially be scammed because developers are so bold. It wouldn't even take 4 years for the project to be dead. The Bitconnect investors are not even funded today because those investors although they are publicly known. You will have to spend more money to sue them abroad.