I don't know why people say bitcoin is gambling. Its not gambling. You are investing your money and time. You use your internet. So its not gambling dealing with it.
Bitcoin is a currency. You cant say money is gambling itself. But if you invest your money and convert it into bitcoin, now it is gambling. Because you take a risk investing your money to a volatile currency hoping it would rise up in the coming days, but you know it might also drop. There is still win or lose in it, so basically its still gambling. The process is gambling, not bitcoin itself.
Ditto! Good point on clearly pointing out that bitcoin is not gambling but the process of trading and investing it may be considered as gambling. It is so because gambling, as how it is defined, is when you take the risk on something and hoping for a favorable result. It is not the gambling that most people commonly mistake as like making an unintelligent bet in casinos.