I don't think you have to worry too much about it. Insurance isn't likely to cover ongoing longevity treatment into perpetuity. There will be limits set in place that will only allow for the wealthiest elderly people to keep it going.

This is intended only for the upper class right now and will likely remain that way, since they control the laws of societies. I'd be surprised if this ever becomes an option for people outside of the wealthiest 1%.