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...
Unfortunately it is still necessary to have a benchmark to give a relative value to bitcoin that makes it "acceptable" in the real economy. And the frame of reference that the "real economy" has used for quite some time is the dollar, since the United States is the economic power of recent years despite its obvious decline. Trying to displace the dollar with other fiat currencies would not really mean an important difference, since the majority of the currencies that you propose also have as main reference the American dollar for their exchange in the international markets.