BTW I trade options so I know about how options price works and I know quite a bit about technical analysis.
One thing I can say is that most bubble charts have the same shape. If you look at AAPL in 2012 compare it to FB, TSLA, AMZN today. You'll find an uncanny similarity in there shapes. With only a variance of 2-4 weeks. Ive looked at past bubbles like MSFT, YHOO, NOK, CSCO too. They have some resemblance to curent bubbles but slightly different.
Anyways by studying shapes of bubbles I predicted the top of TSLA, FB, NFLX they all crashed this week. I believe AZMN is showing signs of bubble but not the top yet. Same as GOOG
My theory is that bubbles are more technical than fundamental but the similarity is they disconnect from fundamentals and then eventually fundamentals pull them back into alignment.
I don't trade bitcoin so I don't know its chart. But a sign of bubbles is when speculators invest on future market domination. I believe they do this to justify their investment as well as recruiting greater fools so they can exit. To me bitcoin smells exactly like a pump and dump.
I agree with your viewpoint with regard to bubbles. Bitcoin prices get ahead of the fundamentals. I admit selling at the April 2013 peak and buying back during the ensuing collapse. There is an element of pump and dump going on - but I think that is not because Bitcoin is a scam but rather because when an asset goes from zero to potentially millions USD per unit, bubbles are going to be inevitable and is it not reasonable to expect that speculators will try to time them?