> While I'm not certain I could state what problem iPhone (or smartphones in general) solves, it's definitely proven market fit. Being a market fit does not me

> While I'm not certain I could state what problem iPhone (or smartphones in general) solves, it's definitely proven market fit. Being a market fit does not mean that it solves a problem. To me, this is only one important reason (though IMHO a more safe one to bet on) among many, why aroduct is successful in the market. As I wrote: Bitcoin attempted to solve a problem that seemed (and in my opinion was) very important at the time when it came out (this also IMHO explains the initial hype). The problem simply has become a lot less important and urgent for most people in our days.