I have full trust in Fidelity Investments, a multi-trillion dollar global financial investment management service company, one of the largest in the world.
Fidelity is governed by my country's (USA) financial standards and requirements just like the two other major brokerage accounts I use, the two major banks I use and another of the world's largest investment companies where I also have significant assets.
I am not the least bit concerned about the security of any of my investments or assets. I'm not in some third-world, corrupt country...
I have no problem paying an annual 0.25% fee. That doesn't bother me one bit!
The medium through which you are investing is a centralized system. Your money is in the hands of a third party. Your money can be stolen. I think it would be better if you keep your holding hardware wallet instead. Because hardware wallets are completely internet-free, there is no possibility of hacking, etc. It would be best if you keep your holding hardware wallet in a completely secure place with yourself.
If you invest through a third party, you can face many kinds of problems. For example, if a third party runs away with your holding, if a third party spreads the word about your account to another person, you can face many kinds of problems. So invest yourself and it would be best to keep a hardware wallet to keep your holding safe.