Oh no.... I noticed this:
At one time they owned 1% of all mined bitcoin
What does that mean? Does that mean that they are no longer in the possession of the 100K coins, which they bought in 2013? Did they dumped most of their coins?
I think they meant they owned 1% off all Bitcoins in existence at that time. Were much further now, so with more Bitcoins in circulation their percentage is decreased for obvious reasons.
It must be that as I have seen quite a recent video from the Winklevoss bro's saying 'we haven't sold a single Bitcoin'.