I personally think that if I give this data to a company, and they keep it "safe" and only to support features that are beneficial to me, that's totally OK, but I wouldn't like companies reselling my mobility data to health insurers (without aggregation or cohorting) to give me a 100% customized insurance rate, regardless of how beneficial that would be.
Data that's used to distill people down to a number and value them precisely seems to have a potential to enforce systematic inequalities and further improve the lives of "haves" at the cost of "have nots".