Bitcoin can never be banned, or heavily regulated out, because it has so much more uses than just a currency. I think this is a good read if you want to know what I'm talking about in depth: http://zanture.com/bitcoininsight/understanding-the-role-of-bitcoin-in-society/

But to summarize, bitcoin is an asset like gold, fiat currency, and an antique all tied into one. It is one of the greatest inventions of the 21st century.