Honestly, I think Silva is a master troll with media and I sorta enjoy it.
I think he's just been hammered with questions on superfights for years that he's just throwing out whatever the media wants to hear at this point.
He'll go from not fighting either, to being willing to fight. He'll go from saying no to saying maybe to saying yes. He'll make crazy remarks like "it'll cost the UFC 50% of their earnings for a Jones fight" (or something similar)
I honestly believe he's just having fun with the whole process, because he always gives that charming Silva smile with each answer.
Really what it boils down to, regardless what Dana, GSP, Jones, or Silva says, it's going to take a fight being officially booked on paper before I believe any of it. Words at this point really don't hold weight for me anymore.