This is very important to think about your crypto security. Here are the answers to your questions: Using TrustWallet: TrustWallet is a popular and readily available option for many. Although there have been reports of some security issues, TrustWallet generally takes quick steps to keep their users safe. If you're hesitant to use a new app or service, it's true that many users have used TrustWallet and most are satisfied with their experience. Overall, using a crypto wallet app on a smartphone is convenient, but using a hardware wallet for security gives you extra security. From your point of view, since you are now using two types of wallets, it will give you a good balance between security and convenience.
I also consulted with many forum members and gained a lot of insights into the issues with TrustWallet. However, I'm already too familiar with TrustWallet and don't want to spend time learning about other crypto wallet apps on the market. I trust Binance, so I'll probably continue to trust TrustWallet.
Investors should have multiple personal accounts because they are usually free, except for some blockchains in the Antelope ecosystem (Eos, Wax, Telos...). And it would be better if they were created and managed on various crypto wallet apps across different hardware devices. Caution is never excessive in this risky crypto market.