What Will the World be like in a Hundred Years?

In a hundred years I think that in a hundred years everybody will drive in flying cars that run on electricity. And houses will be made of metal. I also think that in a hundred years inflation will be so bad that something like a candy bar will cost about fifty dollars. Another thing is that I think that since people will be using flying cars I think that the speed limits will be increased to about 130 miles an hour.