Id sell them all and retire with over 20m in usd. That is enough money for me and my family to live forever.
Same with you, i will sell all my bitcoins and enjoy the rest of my life with my unlimited money from selling my bitcoins. The sad is, it's never happen lol.
This would be the thing I would do too. Cash out and retire. Buy a nice place in italy and live a good live there.
Offcourse I would keep investing.