Should I sell, spend it all on hookers, or some combination of the two?
If you are holding for long term, you are not a newbie to ask this kind of question. You should know that it is possible that bitcoin will get to $1 million in the next 10 to 15 years.
This makes me think he's a troll. Normally, if you've been in this for so long, you know that the trend is going to continue rising indefinitely, with ups and downs, of course. But if you want to sell, the most logical thing to do is not to sell everything, but to keep at least 10%. That 10% could be worth the same in fiat in 10 years as it is today. And I say a minimum. It could be 20% or 50%. That way, you can enjoy profits while staying invested. But saying that he has them on Coinbase, assuming that's true, doesn't seem very savvy in these matters.