I don't think most of the world really cares about dollars.
FTFY

Almost 90% of the daily Forex trades ($4 Trillion +) contains USD on one side or the other. USD remains the worlds reserve currency, so it only makes sense that BTC is and for now at least, remains paired to USD.
how much longer can this really last tho. 5-10 years?
idk
all I know is no one wants to buy US debt anymore, at least not until interest rates rise a little, but the government is hell bent on making damn sure interest rates stay low, this is causing some really weird market behavior, the financial system is broken and everyone knows it, just no one has a clue what to do. Scary! is what it is.