The main thing to learn about bitcoin is that the powers that be will under no circumstances allow it to compete with their own currencies. As always it is their playing field and they make the rules.

Some governments will ban it others will regulate it as a potential haven for criminals but mostly they will probably just tax it.

http://www.forbes.com/sites/cameronkeng/2013/12/16/bitcoin-is-not-anonymous-is-always-taxable/