The "problems" crypto currencies solved are not "problems" for the governments and elites, and they are "by design" to centralized power and rob an average person blind.
Examples,
Cross border payment: banking industry wants their cut, governments want their control (controlling flow of value, tariffs, taxation, sanctions)
Inflation: another form of tax that is "invisible", and the ability to make wealthy people wealthier (they have assets already), and make poor people poorer (wages have not kept up with inflation), and middle class decimated
Creation of Currency (fiat) itself: the ability to get anything they want (up to a certain point) by giving you IOU, this is the ultimate power