Insurance companies
It isn’t required yet, but it’s easy to imagine a future in which insurance companies ask for a full gene sequence before they agree to insure you. Smokers often pay more for insurance; why not the same for those with a genetic predisposition to cancer? If you carry the markers for neurodegenerative disorders like Parkinson’s or multiple sclerosis—diseases that can mean decades of expensive care and specialized prescriptions—your insurance company might write a specific exception into your policy. Just like homeowners in flood-prone areas pay extra for flood insurance, you’d end up ponying a premium to protect your error-prone brain.