What is your point?
You said: "Unless they believe that they could cheat or bribe the FDA". Do you actually have any reason to think this is a likely possibility?
I don't know anything about blood testing, so I can't evaluate their claims at object level
So why did you decide to jump in and focus the discussion on Theranos?
How much money would it take to engineer biological immortality for at least half of the world's population, within 20 years, with 99% confidence?