People need to think of mobile wallets like their actual physical wallets. Would you carry around $400,000 in cash in your wallet? Of course not, you would put it in a bank account somewhere. Why, then, would you carry around $400,000 in bitcoin in your mobile wallet instead of putting it in a hardware wallet or cold storage? Mobile wallets should be for small amounts of daily carrying and spending bitcoin, not for your life savings.

Also, don't protect a mobile wallet with biometrics, since they are incredibly insecure and can be duped, faked, or forcibly taken from you as in this case. Use a strong password or PIN instead.