Simple answer look at the ALT coins. They just got ASICs and they are trading them in for BTC at a higher volume. Plus news for BTC keeps going around with paypal. Looks like it will be taking a large Turn upward for the next few months... I look forward to it. Think of it like that. Alsothe block chain split will drive it up double what ever we get to this September (hoping 5k we will see)
I can't connect the dots. I don't see how selling altcoins for bitcoin would cause the BTC/USD price to rise. If anything I would think it would lower the price, because half the people selling their altcoins for bitcoin are further selling their bitcoins for fiat. While it is true altcoins have seemed to have taken a dip lately, I expect that dip to turn around when people get bored with their bitcoin investments. Altcoins will be on the rise in the near future.