Just don't handle your 100₿ bitcoin wallet from your phone... That should remain in a cold wallet.
In your phone just keep what you are likely use for the day, like, you know, an actual day to day wallet.
Exactly, a cold or hard wallet is the best option if you are holding huge amount of cryptos.
If someone wants to inspect you, they can do it with a decent professional digital camera, not the gimmicks on smartphones. Like a sniper, they can take a look from so far that you wouldn't have the slightest idea (an actual sniper scope would to just fine). There is also the chance that the surveillance cameras could be used, now that there are 4k or better in the market, and definitely have better lens than a smartphone camera, many can be moved remotely and zoom at you on command.
So we really need to take care of everything which involves crypto right now. Criminals will likely target us, whether using high tech gadgets or will simply knock on your door put a gun in your head and steal your coins. I'm not into overly sophisticated phone, btw, so I'm not buying this one even though it has 50x zoom or whatever.