To generate 450k SEK (~$42k USD) annually safely via the 4% rule, you'd need a ~$1.05M USD portfolio (25x expenses) in diversified investments. Bitcoin's volatility makes it unsuitable as 100%, but if allocating 20% to BTC for growth potential, that's ~$210k USD in BTC today—about 1.75 BTC at current ~$120k price.

Factoring appreciation: Projections like Forbes suggest BTC could hit $200k+ by 2026-2027 on ETF/adoption momentum, or even $1M by 2030 in bullish scenarios, potentially growing that 1.75 BTC stake to cover far more. But crashes (e.g., 50%+ drops) are real—don't bet everything on upside. Diversify the rest into stable assets. What's your BTC holding now?