I think about this a lot, as another frugal but high-earning household that earns way more than we spend, even after maxing out 401(k) contributions. Most people in our position save more than they need partly as a means of hedging personal risk (higher-than-typical retirement and medical expenses, children who grow up unable to financially self-suffice), and partly (IMHO) just because they gain some satisfaction fro…
What makes you believe that? The overwhelming majority of savings are held in bonds, stocks and real estate, not in paper notes in a vault. You might quible over the usefulness of savings and investments vs other allocations, but assuming is useless is pretty extreme.