Do I need to bolt a home squat rack to the floor?

It depends on weight and use. Across r/homegym and r/GarageGym discussions, heavier all-in-one units (200+ lbs) like the pooboo cage and Mikolo Anubis 2.0 are frequently used unbolted without tipping, while lighter budget cages and squat stands draw repeated comments that they 'benefit from being bolted down' and can wobble during dips or heavy work. If you train near your max or do dips, bolting or a loaded base plate is the safer call.