The wide range is because the market is new, I believe(and also does others) that the heavy price swings will solve itself over time when we start to get a better accuracy of what the "world" believe steem, bitcoin or any other cryptocurrency for that matter is worth... Then the price will find stability. Also, our inflation rate of steem is reducing, as said in 18 years it will hit 1%. I know it is slow. But I am also talking way out in the future here.