Not so much angry as frustrated.
Crypto currencies overlook the benefits of a centralized currency - some entity to correct mistakes. Fiat currency is backed by the trust in a nation state for example. If my money disappears, I have some authority I can appeal to for addressing it. Whether they do address it or not is a different question, but at least there’s a process.
When someone in stellar screws up and locks out wallets, or when Mt. Gox loses mounds of bitcoins, there is no recourse. Just a “oh, the math makes fixing that impossible” response. Or they can take the ethereum approach and just rewrite history to cover up your mistakes, delegitimizing the entire currency in the process.
In a world with pure intentions and no mistakes that may work, but the real world is messy and people are any combination of stupid, forgetful, and malicious.
Crypto currencies and distributed ledgers are interesting in theory, but will fail due to the implications of needing to operate in the real world.
