He is aggressive cause this question is annoying. Bitcoin is a bubble, crypto-currencies are a bubble, where this topics comes from? Prices never rest, how many
exchange`s are there now, how many people trade everyday, every single moment? Yes sometimes prices drop cause to many people is selling in the same time,
yes prices goes up when new people come and old members buy again.
Blockchain technology is not a bubble! There are scam-coins, and groups that pump&dump some coins, but put them on a side and concentrate on projects that
have usage and great potential for the future.
Of course, blockchain technology is not a bubble! Technology can not be a bubble. But the asset - it can. Existence of exchanges, trade in millions of people does not exclude a bubble. Since most cryptoactive assets are provided only by the expectation and trust of investors, crypto as a whole is a bubble.
But we do not have to worry, as some cryptprojects begin to work and make a profit. Someday the bubble will become full of activity and cease to be a bubble.