To base your investment on basis that 'some rich guy bought...

To base your investment on basis that 'some rich guy bought stock and rich guys never make a mistake' is moronic.
Rich guys get torched all the time. the maths is the maths. The uber rich chinese torched >$1bn on this asset. 
These particular rich guys are traders and might know markets but they are not miners and this is a troubled asset that has NEVER worked as advertised

No broker would have clue whether Gary was selling or not. Whether he sells or not means nothing. 
Plus he is escrowed