I think you don't need to compare the three because they can coexist, like what is happening in the reality. Maybe one of the reason why bitcoin has many haters is that some compare them which we the first place we don't need to do. Let people know the importance of bitcoin. We don't need to pull others just to push bitcoin up. Let bitcoin's characteristics speak for itself. Yes we can use bitcoin as a form of investment, we can use it in mining, we can even use bitcoin in trading using exchanges like what I am using specifically darb exchange so that we can earn money by trading, we can even use it in online gambling. But, we don't need to tell these things. Let people see it for themselves.