Cryptocurrency is to money what the internet is to information. It is a powerful and potent technology, with the power to transform the world. It is an evolutionary tool in the sense that it is already propelling humanity forward. Crypto will help human beings abolish banks, governments, and other organizations with single points of failure. Nonetheless, visionaries, entrepreneurs, and iconoclasts cannot let the utility of this tool cause them to let their guard down. They cannot let themselves be swept away in the hype, because cryptocurrencies are not invulnerable. In a way, Bitcoin, the initial cryptocurrency, was damaged in a hacking maneuver against it, demonstrating that these tools are not impervious to attack.
https://news.bitcoin.com/the-story-of-how-bitcoin-was-compromised/