I understand your concerns, I want to make sure that my money is secure as possible too! I’ll just point out a few things.
If you look around the app, you’ll see that each feature that enables someone to withdraw money from your bank account requires additional authentication i.e. to send a transfer, you must enter your card’s PIN.
Since the security model is getting an overhaul though, when the final version of the app is launched, you could wait for that change before setting up your salary to be paid in to your current account.
I’ve moved your post here to keep all of the discussion about this in one place.