So far, I didn't notice anything that someone have access to the wallet or a transaction happen without my knowledge.
This doesn't mean trustwallet is secure. Everything can happen in the future.
I didn't mean to make them think that way where Trustwallet is safe. I am just sharing the things that I have experienced when I used Trustwallet and I also mentioned that I only use it to receive and send right away and not for storing cryptocurrency. I am fully aware of Trustwallet being a close source wallet. As you have known, we don't know who might know about the seed phrase of wallets made in that wallet provider. I also understand that there might happen in the future and within 4 years of using it, no problems yet.