Stem cells are showing more and more promise. One thing we know about them is that young stem cells are better than old ones. I think there is a lot of promise in stem cell banking.

I haven't pulled the trigger yet, but do plan on banking my own stem cells while I'm in my early 30's because parts of me will inevitably start to break down in the coming decades, and I really like the idea of tapping my own young cells when I am old to heal some of that.

The only company I know of that is doing this is Forever Labs, https://www.foreverlabs.co/, I am not associated with them, I just think they are on the right track with stem-cell banking and have spoken to one of the founders and was pretty excited about what they were doing and think its something worth supporting, which is why I'm writing this comment.