Can people hack my trustwallet?
Any wallet can be hacked, and that includes trust wallet, if you expose your seed phrase or private keys to Hackers by means of clicking and connecting to a phishing website, or by storing it online or not keeping it in a safe place.
Is it safe?
I have been using trust wallet for years now since its one of the near wallets around that provide easy storage, sending and receiving of altcoins, but i must admit that there are better options in wallet market, trust wallet is not open source, and that is one of its downsides, many investors don't really trust or rely on wallets that are not open source.
How to protect my trustwallet account?
Keep your wallet details to your self alone, like private keys, seed phrases, keep it all to yourself alone, avoid connecting to phishing links, do not store your seed or private key online.... This are rhe simple ways to protect your wallet, any wallet, not just trust wallet alone.