Bitcoin is not a bubble.... We are very close to the stability of bitcoin price.....
Bitcoin is not really a bubble however it's price can be subject to form bubbles but that is not really the fault of bitcoin, what happens is that people begin to see the price rise in and then they begin to invest heavily in bitcoin thinking the price is going to keep going up and this artificially pumps the price even further creating a bubble and then a crash, but we cannot say that is bitcoin fault at all.
I think People seem to be too drowning in the idea that bubbles should end with something that falls to 0.
As some others have mentioned, Bitcoin definitely has bubbles, but that does not mean that it is a worthless asset. There's a famous bubble like a really crazy tulip bubble and nobody supports it but it does not happen to bitcoin. The bubble in this case is no different than what we see with the price of the house or stock, the above price increase where it should be and then corrects it back to a more reasonable level.