Making these kinds of moves can prove costly. If you’re hiding cash in your home, you’re not able to take advantage of compound interest, which helps your money grow exponentially the longer you have it invested.
Over here in the UK the highest interest you'll get on a savings account at the moment is about 0.5%, and most accounts give much less. While compound interest is a factor, it's a trivial one. The interest you're getting on money in the bank isn't going to save you in a recession.