Which exchange reduces the popularity of bitcoin? I don't think any exchange can reduce the popularity of bitcoin. Also, exchanges are not responsible for creating any hype for coins. Exchanges just list the coins on exchanges.
Yes, i agree that exchanges can manipulate the prices a bit to liquidate people but they have nothing to do with the project. No exchange was involved in the LUNA crash, and in the case of FTX, it was a different story as the exchange collapsed which dumped the exchange token FTT.
The CZ was involved in the collapse of the FTX, but I don’t know if it was the influence of one exchange on another. Of course, it was a confrontation between two large exchanges and they were competitors in the market, and as a result, the stronger one removed the weaker one. But this is a natural course of affairs in the market where we are talking about big money. The SBF made many very serious mistakes, but in the end, this news did not affect the cryptocurrency market that much.
Exchanges are important for traders, for those who spend a lot of time trading, for holders and investors, this is just a convenient tool that could be dispensed with if necessary. But since they are convenient to use, why not use it, the most important thing is to follow the safety rules and not store your coins there.