When people talk about Bitcoin price, they usually refer to its price expressed in dollars. I really don't understand why...
US Dollar is going down in price, US economy is collapsing. There are many other countries which has more Bitcoin users, like Russia, China, Japan, Philippines and the whole Eurozone. Even ICOs are forbidden in the USA. It's not a so Bitcoin-friendly country, its national currency is not so strong. So why price Bitcoin in $?
There could be many other more appropriate currencies like EUR, CNY or RUB...
SIMPLY BECAUSE DOLLAR IS THE GLOBAL CURRENCY.
They might have banned ICOs for as they say Customer protection but not Bitcoin. USA is Bitcoin-friendly country. Moreover, these two facts doesn't matter at all because Dollar plays a dominant role in international trade and finance as both a store of value and a medium of exchange. Therefor, it will be considered when there is something International. Bitcoin being international need to be expressed in Dollars. Most of the countries have their own exchanges and sometimes price deviates nationally regardless of international price.