Storing your main asset and portfolio on a smartphone is a big no. You shouldn't do that, even it is your main phone. What you must do is to have your phone dedicated only for crypto because I think that you're able to afford that. Because using your main phone, it also means that you're going from one point to another and you're going places.
Not only are you bringing your phone from one place to another, you are also using it for different purposes which may expose your phone to different risks. Using different social platforms, downloading different apps and software, you never know what kind of risks may those things bring.
Navigating through links may also endanger your device so it is much recommended that you only use your mobile device for crypto alone.