Well, i can see that OP is quite old when bitcoins were above $10,000. If you see the price for bitcoins now, it is below $10,000 and yet most of the poeples are holding their bitcoins.
I think that not only the peoples who bought some bitcoins at $20,000 are holding the bitcoins but also those who got bitcoins at a dip or the mid value are holding their bitcoins. Also i think that most of the peoples who had bought their bitcoins at price above $15,000 might have panic sold their bitcoins.

None of the investor is going to loose their funds investing into bitcoins and each major investor will surely bear some good fruits for his patience. Petience plays a vital role and it can really give you some good profits too. Don't panic sell and you will win by holding your coins untill they really reach the moon.