If that was to happen then when FBI breakdown the silk route and found the chunk of bitcoins in this process would not have been selling it in open market. Once more think that when they are selling this bitcoins means they are supporting it. So i think what OP is expecting is not possible. But still cannot say about future. If that happens then it will be benefit for the other Altcoins as Bitcoin will lose the faith from its investors and they will diverse themselves to other altcoin.