i think that bitcoin is going to replace all worlds money because the technology is really great and it is impossible for governments to have impact on bitcoins also its impossible to hack this technology
If this will grow it will benefit us especially those who invested, so it's a win win situation of us in the future.
This is really hard to foresee actually as Bitcointo replace the fiat system in the entire world since the price of Bitcoin is very unstable and fiat is a more easy to use in daily basis. I see Bitcoin to be a currency in cyberworld or in the international exchanges or transactions since it is much easy and less fee in sending money from abroad.