All the naysaying and scepticism of bitcoin will going to end soon. As in a well regulated market only are few currencies will be traded. And for sure bitcoin will lead from front.
While I agree with the other things you've mentioned about altcoins. The skepticism will never be gone for bitcoin, there are people that are for anything risky and would like to have an exploration with their investing journey. They're the people that are open to new things like bitcoin but, there are the people that would like to stay conventional and traditional and that means, they're permanent with that belief and no matter how hard you explain to them what bitcoin is, they'll never believe.