Many are saying that indeed bitcoin is just a bubble. Ofcourse those who don't believe in bitcoin will say that. However, whether it's a bubble or not, it is up to the person like you and me if we will believe in it and continuously invest. We all since then that investment requires risk as well. This can be a humor only unless bitcoin will continuously prove itself that it is not.
Yeah it is depends on what we believe ,if we think its a bubble then stop investing but for me its not a bubble ,many of us help by bitcoin and this is one of the reason why i still believe in bitcoin.
Belief, trust, faith, confident... or whatever word we would like to say about the future of Bitcoin to other people they will still say something that Bitcoin's price increase is a bubble and we can't really blame them though because what happened to Bitcoin is a historical event of our generation as this is never happened before and the first time a currency that valued so big even it's intangible.
Those rich and well known individual that says something bad about the future of Bitcoin or any other kind of cryptocurrency are just a wanna be experts that hides their motive because they are just scared to what will be the adverse effect to their businesses.