It would seem worthwhile to bank things like umbilical cord blood so that if these therapies work in the future, you have a supply of your own cells. Immunosuppressive therapy isn’t that fun.
That would be cool, being able to generate stem cells with your own DNA dynamically later in life would be cooler (please pardon my elementary biology approach to this, I know that is an an Everest sized mountain to climb)
There are companies now offering stem cell culturing and storage from adult samples. Something I've been meaning to look into actually.