Seriously, put the annual max ($10k) into I-bonds today. Yield for the first 6 months is 9.62% and with current inflation I don't see that likely to drop for the following 6 months (the rate for the following 6 months is set November 1st).
Even if the yield in the second 6 months is literally zero, you will have a better return than CDs or auctioned treasures. Note that you cannot cash out an I-bond for 12 months, and if you cash it out in the first 5 years you lose the last 3 months of interest.
EE bonds are ridiculously bad today.