People have been saying that bitcoin is a bubble at $2000. But if we go back to $2000, will anyone say that bitcoin is a bubble any more? Probably not, because it's going to be a 90% loss for anyone who bought at the all time high.
Personally i think that bitcoin's rise has been very quick, and when bitcoin was close to the all time high it was a bubble. However, now that bitcoin is under $11k, it seems quite stable since the ultimate support is at $10k.
And who would argue that the advancements that bitcoin has made in terms of adoption wasn't worth the 1000% rise in the past year. If anything, the bubble has already popped. We're just going to be waiting for the next bitcoin season, that is all.