Your BTC's in your wallet is only as safe as the device you store it in, if you have good opsec and you use your wallet offline with more than one backup of your seed phrase stored in different location, then your fund is safe. Some people think that because the BTC network in itself is safe and secure, then the BTC's in their wallet is also safe, but that depends on them alone. If you use store your coins in an unsafe environment, surely it can be stolen by attackers.