declining cagr. the next 4 years will NOT return 70%.. more like 30-40% if we're lucky, maybe 50% if 2021/2 was an outlief
there are many good calculators for this.
everyone's situation is different (where living, cost of living, carrying costs, intent to travel, etc).
also helps if you can adapt and cut expenses when needed. QOL is a huge factor (do you want health insurance? a big house with a garage?)
imho, if your savings are 10x+ what you can live on in the bull, then you've probably crossed the threshold. on the risky side, at the lows of the bear if your savings are 4x annual expenses, you can get by. this probably wont be true in 30 years from now, let alone 100 or post subsidy due to declining cagr and volatility. retiring in a bull market means youve got to stomach the potential drawdown. retiring in a bear means forgoing fiat mining cheaper sats. if you have additional cash flow from side hustles, its a lot easier to stomach and work when you want to.