Does dollar price will be stable in world economy?

The Dollar is seen as a currency that can be used a lot in the emeging markets so it's going to stay strong because of that. I think their economy isn't so strong at the moment which is having a negative impact and because the emerging markets are huge I think that it's grip on the world will become weaker. This has to be a good thing as it's not good for one country to hold the power and we know that money means power.