You can get a reasonably secure system but nothing is perfect. Even the best hardware wallet can be hacked with enough resources. But if there’s only $2k on that bitcoin wallet, you’re not going to spend millions of dollars breaking into it. The important thing is to secure your devices based on your risk profile and what you’re trying to protect. If you had 10 bitcoin then you’d want to spend more money on a more secure device with added safeguards. But if you just want to secure family pictures then just standard encryption with a strong password and an authenticator app is good enough.

Not a security expert but this is what I’ve learned over the last few years trying to learn about this stuff. Fwiw I have never heard of someone stealing bitcoin from a mobile wallet which means that a lot of these attacks are theoretical and/or targeting unique individuals (e.g. enemies of the government, extremely wealth people).