The only remotely viable alternative is an insured annuity funded by the payroll tax of each taxpayer. Let the money managers invest the funds subject to the defined benefit. Insurance of the benefit provided by private insurance companies and secondary insurance of the benefit provided by the federal government.
Imo, ownership of physical commodities is the only hedge against of the global financial system. And it's not feasible for individuals to own sufficient quantities to make to survive on them as a currency and wild swings in inflation would ensue.