Just like someone else said above, it depends on your definition of successful.

Adoption is growing yes. But is it growing fast enough ? This is not your grandma's world anymore, this is the age of internet : anything that's not growing exponentially has a strong likelihood to die out.

Also, yes, I do look around. I note that I still can't go buy my coffee at startbucks with btc. That I can't pay my taxes with BTC. That if I try to pay someone in my friend & families with BTC, they look at me like I'm some kind of weirdo.

And I'm saying, the whole point of the OP in fact, that if we don't get our asses in gear, BTC will get the living daylight beaten out of it by simpler, faster (yes potentially weaker and less safe solutions - but then who cares about that shit when you buy a cup of coffee ?) coming from the fastest growing parts of the internet: China, Brazil, Indonesia, India, Africa