*No, we will have other crypto coins and commodities to speculate against.
-How will Bitcoin affect income inequality?
+Due to human nature, will it change at all?
+Will it cause central banks to increase/decrease the money supply?
* If it keeps up with energy inflation, like I suspect it will, it will allow people to save for their retirement instead of having their savings inflated away by central banks or forced to invest in risky stock markets.
* You wouldn't have to charge interest on a loan to maintain purchasing power.
* Government would have to run a balanced budget which would mean smaller government.
* You would have true capitalism, with no government bailouts. This would lead to more honest politics.
* There would be less wars because you couldn't raise the finance against your yet to be born citizens.
* We wouldn't have a world fueled by population growth, which would be more efficient on resources.
-Will it every be the Worlds Currency? (eg the one currency accepted/exchanged everywhere)
I think as the world becomes more "digitalized", a currency like bitcoin will be needed, I just don't know if the political powers will allow it to become the one. When it comes down to it, the lawmakers will be reluctant to give up certain powers, and may cause some headwinds for the future of bitcoin.
* Politicians don't choose the currency, capitalists choose to accept it, that's why communist countries have empty shelves.