It would be amazing if those numbers come to be true.
The only way they could come to be true is if the dollar is worth a lot less. In today's dollar, no way.
Its all supply and demand. It could be real possibility when you are are only getting 3 bitcoins per block find here in a few years. Those numbers are probably inflated some but it could be. We do have a non physical fiat worth about $420 a coin right now.
No. Bitcoin is introducing people to the concept of crypto-currency that is neither controlled nor backed by government. But by the time demand for crypto-currency in the mainstream reaches that kind of demand, there will be at least one (probably more than one) alt-coin helping to meet the demand. Kind of like AOL introduced the mainstream to the Internet but now is no longer a major player in providing Internet service.
Bitcoin is the place to be now, but there is no reason why alt-coins can't provide supply to meet the growing demand once the masses grasp the concept.