Cryptopia was an exchange that many people participated in 2017 but after the attack of more than 15 million USD, this exchange was unable to control the situation and they declared bankruptcy. I think this will be a huge loss in the crypto community because many people are holding money here and they probably won't be able to get this money back in the future. Anyway, this is an exchange that I will keep in my memory because it helped me to earn a very high profit.