I think that BTC was in a bubble in 2017, but that is almost nothing compared to new bubbles which will come in next few years. BTC is nothing like tulip mania, because tulip bubble burst only once and never came back.
Tulip mania doesn't have anything to get relative to the bitcoin. What we see with bitcoin is the real growth, at times there were little price manipulation and the same gets termed as bubbles if it provides with a large scale profiting. Growth waves will continue to be a part of cryptocurrency, and this at times gets mentioned as bubbles. Nothing is gonna happen on these indications.