I just finished watching Russell Brand discuss bitcoin, which he didn't understand. The concept intrigued him for the obvious reasons--cryptocurrency poses as something which is outside the banking and economic system.
That's not really true. I know enough about these things to know that they are not what they pretend to be. Which is why I suggest this e-book on the subject:
https://www.mybloggertricks.com/2018/06/bitcoin-is-scam.html
The person who wrote this knows a whole lot more about the subject than I do, which is why I recommend it. You don't really need to know a lot about the topic to sense that it is not what it purports to be.
On the other hand, knowing what exactly it is makes it far more scary than fiat currencies.
Bottom line is that commodity based currencies are volatile. Fiat based currencies values are determined by central banks. But cryptocurrencies aren't really either. If anything they combine the worst of both worlds.
But, hey, it's your money: not mine.