Rumor or not , it will only depend on the people if he will sell . they might sell because they badly need the cash and you wont mind the value at all because what more important to you is your self .
If its true that people who bought btc at 1000usd , they did actually earn alot of profit even on the current value of btc .
They maybe not active on the year where btc pump . thats why they missed the boat . or they only sell some of percent because they will continue to hodl .