Seems like even the CNBC doesn't understand the term "bubble" anymore... We don't know the value of Bitcoin, but it could easily be several trillion USD in market size. In that case it would be very far from being anything close to a bubble.

Will the price retract for a period of time? Probably, that's what happens most of the time in most markets after a bull run. But that doesn't make an asset a bubble, which would imply that the asset is overvalued (which with Bitcoin nobody can assess right now).