My friend bought a bunch of btc in when it was still under $1k per coin. He has about 7 coins I think. He has yet to sell any. He lives in Indonesia and gets social security which covers his living expenses since it's so cheap to live there.
Even though btc has reached "too big to fail", it's still relatively new and anything can happen, so if I was him I would have sold two coins when it hit 125k months ago, and invested that into the S&P500 + QQQM or VGT as a back up plan. The remaining 5 BTC is plenty to retire in Indonesia or even the US if he chooses.
And if something happens to BTC in the future, hey at least he would still have 250k fully invested which will grow pretty fast with a 10% return each year. 250k fully invested is like halfway to a million dollars. You can actually retire in Indonesia on just 250k if you live very frugally. 400k and you can retire very comfortably.