Paolo Ardoino, CEO of Tether, said that Bitcoin is unique among more than 14,000 cryptocurrencies because it is the only decentralized currency. "Bitcoin is the only currency that is ruled only by mathematics and basically cannot be changed. Apart from Bitcoin, some cryptocurrencies are more centralized, while others are less centralized. For other currencies, you will see a group of developers every month. They will release new software versions, change monetary policy, inflation, deflation, they keep making changes. Mr. Ardoino acknowledged that his views on the unique degree of decentralization of Bitcoin "could be controversial", saying publicly that Tether is centralized and different from Bitcoin.