I’m very familiar with Florida’s rules about this. The scenario you’re worried about is if you have a license and a car registered and tagged (license plate) at the DMV. If you have a valid license plate and no insurance, the DMV either wants the valid plate back, or you’re forced to get car insurance, or else your driver’s license will be suspended. They do this to prevent uninsured people from driving around with valid tags (license plates), basically by getting insurance, registering the vehicle with the DMV to get a valid plate, and then canceling the insurance, in order to “appear” like a valid driver.

Additionally, if you have a vehicle in your driveway and no valid license plate, you can be cited by the local government’s code enforcement department, for having an unregistered (junk) vehicle in your driveway. I don’t remember exactly what the citation was for, but I’ve received one when I was young and first getting into the car hobby. I think you’re ok if you have a car cover. I’m a car enthusiast and I have always had multiple vehicles, and have been told by my city I had to either register the car, get it out of view (I think getting it covered up with a car cover counts, but they really want you to put it in a garage), or get rid of it. Some municipalities don’t care, some care and don’t enforce it, and some do enforce this.