Unless you can find a way to pay for your retirement almost entirely in Bitcoin, you will probably need to transfer it out to something more liquid. No one wants to sell you a house in Bitcoin only for the value to drop significantly overnight before they could convert it to cash all because some tech billionaire made a funny tweet. Maybe a stablecoin has more potential for a payment system but Bitcoin is just too risky to hold onto if you aren't trying to make money off of it. If someone really had that much Bitcoin laying around, they might as well just take out a large chunk now to throw into a stable index fund and just live off the dividends. Even just a yearly return of 1% from $100M would provide a lavish lifestyle where you'd never have to do anything you don't want to ever again. Set your whole family up with trust funds, make a huge donation to get a hospital wing named after you, fill a garage with supercars, the choices are endless. Or you could just sit staring at a computer screen as your crypto bounces around waiting for some huge crash or new legislation to fuck you over.