For curiosity, what do you think about EMA, SMA, etc?

Nothing seems to move up or down (yet) in Bitcoin world, so in the mean time, would you kindly share with me what you think about EMA, SMA etc?
Are they rather old? Any use? If you are utilizing them, which MA, which parameter do you choose and why?

Personally I used EMA 10, 20, and 50 back when I traded Gold, but now my friends seems to ignore MA altogether, haha.