Maxed out all of my tax-advantaged space for 2020 and 2021 and still have some cash to deploy. Would EE Savings Bond be a good strategy? Principle doubles if held to maturity (20 years) so that is effectively a 3.5% per year return for an illiquid bond asset. $10k invested today will yield $20k in income in 2041, and so on and so on if I max out each subsequent year. The idea of effectively funding an annuity at a 50% discount so that I can delay collecting on Social Security definitely has its appeal.

Portfolio is low seven figures, most of it in taxable accounts unfortunately.

Current asset allocation:
40% US Equities
15% International Equities
15% Long Term US Treasuries
10% TIPs
10% Corporate Bonds
5% REITs
5% Gold

Is there a better use of my money? In terms of risk I feel like I have a ton of equity risk. Main existential concerns would be rising interest rates, lost decade with U.S. economy, US Dollar losing its status as global reserve currency. Main practical concern with EE Savings Bonds is Treasury Direct would be easy to miss for my beneficiaries and/or they might not bother to attempt to get a few thousand dollars out of a pokey fed account.