The primary purpose for cryptocurrencies is money laundering for unsavory acrivities, but cryptocurrencies are not an all-purpose tool for avoiding government authority. It matters not how much wealth someone stashed away in anonymous wallets, since the authorities merely need to restrict access to exchanges in order to control capital flow. The so-called "peer to peer" is extremely limited and will continue to be limited, as blockchain technology gains wider adoption. The need for insecure "peer ro peer" will be obviated by citizens preferring centralised exchanges with deposit insurance and regulatory oversight.
Trusting a decentralised, unregulated, nascent technology for security is surest path to being exploited by thugs and pirates. The numberless cryptocurrency scams that pop up every day testifies to the pervasive insecurity of this nascent market. Until the cryptocurrency market sphere is firmly under government regulatory guidance and banking/hedge fund stabilisation, the ownership of any cryptocurrency is high risk gambling. The reason people prefer to trust governments and banks is because the alternative is far, far worse. The greatest security a man can have in this world is to live under a well-governed society.
RE: Keeping value out of reach