Bitcoin can not currently say bubbles because they have not actually broken. Even last month the bitcoin gets big and the price is high but now the bitcoin has not gone down until the value is zero so bitcoin can still go back up again.bitcoin can tell bubbles if bitcoin it will fast big and then broke in instant.
Ignore those who talk about bubbles. Bitcoin was a bubble back in the $400-$500 days, and it still is today. In other words, it's a continuous bubble that keeps growing larger and larger throughout the years.
Once we're about the break through the $50,000 mark, Bitcoin will again be a bubble, which is something that will never stop. People who don't understand why Bitcoin has value in the first place, will even say that $100 is a bubble.
I however find it quite funny that despite these people not valuing Bitcoin, they still find it necessary to talk about it regularly, like it's part of their job. If you don't like something, then just ignore it, it's that simple.
It however has to do with them having missed the early train, that I am sure of.
More like people who don't understand that Bitcoin has no inherent value in the first place don't understand what bubbles are. Bitcoin's price is entirely made up by consensus and is therefore arbitrary. Unlike a lot of things that also are valued through consensus, Bitcoin lacks wide-scale adoption, meaning the number of people reaching consensus on value is extremely small and shallow, and therefore much more likely to be an outlier than say the value of the USD which is valued through consensus by hundreds of millions of people (on the low end). Bitcoin's price is made up by a small number of people screaming into an echo chamber and slowly more people get sucked in at already higher initial prices, so it doesn't look crazy to them. But eventually, you will run out of new people to get sucked in, and you are left with only your small echo chamber, and there's no one to sell your coins to anymore at higher prices. That's when the bubble pops. Perhaps we are in that phase now that the price is on a heavy and steady decline. Only time will ultimately tell.