Bitcoin's underlying technology creates the possibility of decentralized governance, starting with currency, which is the connecting link between actors in societies based on economy.

Why such a future might be beneficial to mankind is that banking and finance being controlled by a few has led to errors with systemic consequences.

See the 2008 financial crisis and hyperinflation in Venezuela and Zimbabwe. See the seizure of funds by governments from individuals in Greek and Cyprus, scenarios where many of the affected did not write their own doom (others wrote it for them).