What is a bubble? So in the past cenutrys, there was a lot of bubble. And i can say, that last year, a lot of coins who has no value hat a real high price. But there are still a lot of other coins and blockchain projects, who has potential. And the blockchain technology too, no question. So i think there is a part bubble in cryptocurrencies. These are all those non valuable coins with no projects behind. In some years, a lot of these coins will die.