I think this is the only bad thing that ever happened to BTC  because except this single disadvantage BTC has all advantages. Being decentralized cryptocurrency, criminals are using it for their bad deeds and due to its decentralization, their identity is also not revealed, so many illegal activities like terrorism, Ransom killing, kidnapping are happening with the help of BTC but once it has been centralized, government would take control over it and then would be 100% secured.