Bitcoin is an encrypted digital currency with no central authority. Its decentralisation facilitates the trading process as it does not depend on the third party like bank or broker company.
Moreover, no country owns bitcoin and it is not restricted by any region. Therefore, its trading is completely anonymous and barely involved any cost.
Bitcoin adopts cryptographic technologies and computer science to control its production and trade. As its overall production is 'limited', it will not be overproduced causing value depreciation.
In real life, the entity currency production is centrally managed by the national bank. In the case of inflation or invasion hacked, the general public cannot do much to react.