The major governments of the world have for some time been laying the groundwork for their own national cryptocurrencies. Does that matter? Yes, it matters a lot. Bitcoin will be a direct competitor.
Why do they do this? To remain in financial control and to stop financial crime like whitewashing of funds from happening. Is it likely to happen? Yes, the US banned holding gold privately in the 1930's. So that the US government was to be a monopoly gold holder in the US.
There is a clear danger that the US, Europe, China, Japan and others will get togheter and flat out ban and even criminalize the usage and holding of Bitcoin. Resulting in after the ban, if you are cought using and holding BTC, you would get a huge fine or jail term.
The price of Bitcoin would get killed completely, you would be looking at Bitcoin below $1000.
How likely do YOU think this scenario is? Although you might say this is only speculation, IT IS A FACT that these countries are working on cryptocurrencies of their own.
Bitcoin has an high value than other currency and it can use by all people because of the lacking of authority. Government would ban bitcoin if the criminals using it on terrorising or it will be a threat to the current economy of their country. It all depends o how it will use either bad or good it is on hand of the person