Rug pull scams "pumping up" a new project, nonfungible token (NFT) or coin to get funding. After the scammers get the money, they disappear with it. The coding for these investments prevents people from selling the bitcoin after purchase, so investors are left with a valueless investment.
I don't understand the last sentence but taking it with what you're trying to say. It's true that these scam investments coming from tokens, coins and even NFTs, they'll just leave their investors with nothing once they're done with the project.
That's why many projects went to zero because that they've pulled out their investors money turned into their profit. That's what happened and sadly, these victims can never retrieved their money which turns into their losses.