I personally (and many others) have no reason to doubt Bitcoin because it has proven itself through more than 10 years of existence as the only decentralized cryptocurrency that was created with a purpose and has its own practical application. What you are talking about is something completely different, because if someone creates a token/cryptocurrency only with the intention of making a quick profit for himself (or someone else), then that is diametrically opposed to what Bitcoin represents.
According to what you say, most of these altcoins/tokens are actually gambling chips, and the people who buy them are actually gambling with them because that's their only purpose. In that game, most players lose everything they have, and they say that this percentage is around 95%, while only 5% profit.
I wouldn't call it a fair game because all these projects promise something completely different, while in fact they are essentially frauds that only individuals get rich from. In the eyes of the regulator, this is a problem that is being tried to be solved, despite the fact that most people think that someone is taking away their right to trade.