He believes his longevity routine makes him more productive and will extend his working years (and thus earnings potential). While some of the longevity treatments billionaires are pursuing are undoubtedly extreme, when it comes to wider landscape, more and more high-net-worth individuals (HNWIs) are investing in longevity practices on a scale never before seen. Sinclair says that every HNWI investing in longevity will likely have a tailored plan optimised for different goals – many of which may have may have dual health and wealth benefits. McCormack advises HNWIs considering longevity to treat it as a two-part investment. Then again, this could end up being for nothing if future generations aren’t investing in their longevity as well.