Personally, I do not trust the guarantee of the safety and security of investors' funds in any platform, whether centralized or decentralized. In my opinion, there is no such thing as a 100% guarantee.
Regardless of whether the platform is decentralized, there are many factors that can cause investors to lose their money, such as price fluctuations and collapse in some cases, as well as cases of hacking decentralized platforms due to some loopholes. These cases have already happened several times.
Therefore, in my opinion, even decentralized platforms do not provide full guarantees, but they are better than centralized platforms anyway.