Be careful, never sell bitcoins because someone is greedy for money because the price of bitcoins has increased. Learn to buy bitcoins, not sell them.
I don't think someone would want to sell their bitcoin at this time just because they are greedy for money when they are fully aware that the Bitcoin that they are holding can give them profits in the future.
Anyone that you see who sells their bitcoin now is doing it for financial reasons and not for greed. I can't have an urgent need of money and you expect me not to sell my bitcoin so that I won't appear greedy, whereby I know that I can buy bitcoin back at any time I have the money to.
Majority of the persons I have encountered recently are more interested in HODLing rather than trade BTC and that's very commendable because despite the price or current dip, the reaction and reference it has gotten has done well to auction its value and potential to its future clients.
What's more impressive is the fact that despite the talk of halving next year, those with means still want to HoDL via DCA strategy until this period has elapsed then sell or keep accumulating more BTC.