Lot of people probably just taking out the gains they earned from buying last year or earlier. I can see if a bunch of people decide to sell to buy something that it could look like a fix... it could just be a bunch of profit being taken out and when that volume sold off the price jumped back up. If you bought at under $1,000 and sold at $11k then again it is this up and down that lets the day traders play. I feel sorry for they guy who just bought at $11k and then looks again and price dropped oh man that would have sucked but as we know it went back up so they will have to get use to the tide or jump off the boat.