The National Institutes of Health, the Centers for Disease Control, the Central Intelligence Agency, the National Security Agency, the FBI, DEA (Drug Enforcement Agency), ATF (Alcohol, Tobacco, and Firearms), ICE, CBP, and DHS (Department of Homeland Security) could then mine the database for insights into disease, epidemics, crime, intelligence, and so many other purposes. Just imagine the possibilities.
I would imagine personality and/or propensity to mental illness or addiction are decent predictors of likelihood to commit crime.
See this podcast for an actual experts take https://samharris.org/podcasts/211-the-nature-of-human-natur...
They won't be watching out for you based on personality disorders, addiction, or any other reasonable indicator. They'll watch out for you because you have attributes that match the type of people in jail right now. It's not going to be indicative of criminal behavior.
The morality is still fairly grey though, and I think the reward vs intrusion ratio would have to be pretty high before it gets widespread buy-in. Personally, I prefer the state being disinterested in my genes.