Android : Securely storing user's balance in Parse data browser

I am building an application in which a user will be receiving money and sending money using Stripe. I would like to hold the users balance in Parse's data browser and let it accumulate until the user wants to withdraw their money. Is it secure to make an object to hold the balance and then just continue to update that object in the future? I am afraid of an intruder possibly decompiling my app in the future and them somehow change their balance to a much higher number and withdrawing in the future.

Thanks ahead of time!