So you think people will prefer to use worthless plastic/paper currencies that are continuously deflated by governments to fund war and oppression? Cryptocurrencies will streamline the new digital economy - which encompasses all of our lives. Hardware wallets will soon allow people to secure their money with ease. Cryptocurrencies will revolutionize the world in ways that we don't yet understand. It's hard to conceptualize, but bitcoin the 'currency' is so insignificant compared to bitcoin the 'invention'.