Trustwallet is a hot wallet. Cold wallets (e.g hardware wallets) are better (way more secure) especially if you're holding large sums of money.
Do you have a reference to a thread that discusses it in a complex way? I want to know more, I'm sure here I can get deeper insight than just reading in news outlets about crypto.
I have some threads in mind, which might help you to get an idea about all kinds of wallets.
Things to keep in mind before accumulation of Bitcoin This article has a part where the OP explained about types of wallets that are best to hold BTC. And you will find another link within this article which is -->
[Crypto Wallets] Cold and Hot Wallets and their Approach. This is also comprised of good wallets. I prefer you to read some replies as well because they can give you a better idea.
If you want to know more about wallets, especially for BTC only then this board is for you -->
https://bitcointalk.org/index.php?board=37.0 But if you want to get a list of available wallets for you on some type of preference then give your data here and the site will give you good recommendations -->
https://bitcoin.org/en/choose-your-wallet?