If the y want to sell their holding let them do that. Even if this is the reason for dipping, though I think we are more struggling with the demand at this point. The faster they sell the better. If you think about this more for a second these bitcoins will be sold eventually like it or not. Let them sell if they cause panic selling, good go and grab some cheap bitcoins out of this. As from dome sources I've read so far they've been doing this this year and that's okay if they want to sell let me hem sell. We don't have the power to stop anybody to do what they want to do.