The inventor can go old school and use it personally until it catches on with friends/family. Or is this a monkeys paw kind of cream? What about cream that wor

The inventor can go old school and use it personally until it catches on with friends/family. Or is this a monkeys paw kind of cream? What about cream that works for 10-20 years but ends with rapidly progressive multifocal melanoma? I would probably still do it if i was 65-70 years old.