And by the way, bitcoin is been called a bubble for far too long.
Many people buy that "bubble thing" some years back and now regretting that, though.
Anyone who feels bitcoin is a bubble should dump theirs now at a lower value than the present one as there are so many people willing to use what they seem not to be valuable. As long as bitcoin remains spendable and it adds a value and can sustain itself, then I do not see that as a bubble.
In either case, Bitcoin will probably be called a bubble until it cracks $500k~1000k and begings to stabilize.
The bitcoin will not explode. This coin is developing and becoming more popular. But people do not want to believe that there is a new era in finance and that's why they call bitcoin a bubble. Soon they will understand that bitcoin is a panacea