I.e. to someone who was early into Bitcoin, they might wish to never sell off all of their BTC.
And besides, even if you wanted to sell off your Bitcoins, there are a number of things to consider:
- Taxes. Why sell millions of USD worth of Bitcoin now, and pay taxes on all of it today? Possibly better in some situations to sell enough to live comfortably for a few years, and then sell more later when you need to again.
- What are you gonna do with the money instead? Put it in stocks? Buy a bunch of houses?