If your country ban bitcoin i think that you can still earn bitcoin and life good.How your couuntry can controll your secret bitcoin wallets?If you use bitcoin and send to skrill or paypal or other your country cant see your transaction and you are winner.
Actually no one can stop you from using bitcoins 
but the question is suppose its banned in a particular county then what would be the effect ? I think that if bitcoins are banned most of the people would panic and sell them ( for that specific country ) but that been said if such news comes like for example in newspaper then everyone will at least get curious and would want to know more about it, hence spreading bitcoins to more and more people.