Retiring after this year. 42 years old.

Retiring at 43 at the start of next year. I’ll have a $60–65k pension (no state tax, no COLA), about $4,500–5,000/month take-home. Current spending is $2,800–3,500/month. Extra cash will go to build a taxable brokerage until inflation equalized my spending with my pension, with 3–6 months of expenses available in a money market. So upon retirement I’ll also have these in place to pick up the slack. I’ll have: • $500k+ in a fully invested 457(b) • Right now $250k in BTC/ETH (yes I know, I should rebalance — this is just “extra”) • $15k in a Roth • $8k in an HSA (I’ll keep maxing it out in retirement) with high-deductible health insurance • A paid-off house I expect inflation to start eating into the pension in 7–10 years, but the hope is the 457(b) is near $1M by then. Plan is to rebalance to keep a few years of spending out of market risk and roll into Roth as I get closer to 59. Goal is to never work again. What am I missing or underestimating?