Title says all. Personally I vote bubble. Anything that increases 1000x is too good to be true IMO.
I disagree when talking about things that the general public has little awareness of.
How much was Facebook worth when it was a few guys in a dorm room and noone had heard of it? $3000? maybe?
How much is it worth now?
When its estimated worth went from $3000 to a billion dollars was it in a bubble? its market cap is now 400 billion.
My point is big things start small, not all price rises are bubbles.
Many are though, and the recent upshot of Dash etc could well be a bubble, but it could be awareness. I dont know which it is.