bitcoin is not a bubble, i think people are just saying that bitcoin is a bubble since it is a new technology and they are comparing bitcoin back to the internet bubble, however it is so much different, if they try to compare bitcoin during the internet bubble, simply because both are using the internet, they might want to check back on their history, back then you can create websites, advertise and make profit, it became an internet bubble, because a lot of companies are so business savvy, that they can attract a lot of investors, however, what they lack is the technical knowledge, though the prices of their companies went up, they do not know what to do, and how to handle the situation in the end, a lot of internet companies were forced to shutdown and only a few good ones are left and became giants in their own right, however this is not the same with bitcoin, bitcoin doesn't have a CEO, bitcoin is technology and we cannot shutdown technology, especially at this time, we need technology in order for us to survive and when it comes to bitcoin, it uses block chain technology, which in turn, gives a us value, thus the price of of bitcoin. those who still think that bitcoin is a bubble, might also want to check the history of money, since bitcoin is also considered a currency and in time, i hope that they will realize that bitcoin will still grow and will worth a fortune.
The more am reading about the possibility that Bitcoin can be a big bubble the more I realize that maybe people really don't understand at all the history of bubbles when they applied it to Bitcoin. Since the market is getting bigger for Bitcoin and there is a limited supply, the price has to rise. But this rise is always checked by many corrections along the way...these corrections are providing the needed bumps and humps so that at the end Bitcoin can avoid bubbling.
In my opinion, a bubble can happen when people will stop buying into a certain investment or even a product due to many factors. And since there is less buyers and maybe more sellers and people decided that a certain tool has no value anymore, the value will plummet and less people will pick it up or buy it again even at a very low price. This happened actually to many altcoins leading to their deaths.
Will this happen to Bitcoin? No one knows the future for sure we can only speculate and wait.