There is one such argument and I don't think you would need another one. If you trust your government to control your money good for you. But most of worldwide

There is one such argument and I don't think you would need another one. If you trust your government to control your money good for you. But most of worldwide population does not trust their governments and for a good reason. If you live in Iraqi or Syria or Somalia would you prefer your central bank to control your money or do it yourself? Blockchain gives you that option. Wealthy people in these countries use offshore locations to secure their money from their own corrupt governments. With blockchain everybody can have such option and thus motivate governments to create better environments for ordinary people. And it is not surprising to see that democratic countries embrace cryptocurrencies and try to regulate them but more authoritarian regimes just ban cryptos.