Half hardware wallet, half exchange. Any experiences/ideas?

Been a year into Bitcoin (besides stocks and ETFs) and decided, also because of the recent hack, to keep half of my bitcoin on a exchange, and the other half in a hardware wallet. This way I can trade a bit with the half of the exhange, what I am doing already, and keep the half that I want to keep "forever" locked away from hacks.
Good idea? Any tips?