Mark Karpeles, former CEO of Mt. Gox, said in an interview at Blockchain Week in Korea that the risk of centralisation in the industry is too high and there are too many scam projects. "There are so many projects like this that I would use the word bad in a very broad sense because it is either a scam project or a project that does not bring any new content that is too prominent." In addition, Karpeles also did not forget to promote the hierarchical deterministic wallet (HD) technology, saying that if there was HD technology in the Mt. Gox era, the tragedy would not have happened. It is reported that HD is a wallet that can securely manage and generate multiple public and private key pairs, which is generated by a master seed.