I'm getting a slight anti-cryptocurrency vibe just scrolling briefly through here. That's a complicated subject I am not fully decided on.
My understanding of cryptocurrencies is that they are supposed to be un-inflatable as the currencies themselves have a known, unchangeable rarity*. This makes them analagous to gold. Adding to this analogy, Bitcoin is expensive and inconvenient to transfer for small payments (like gold) so there exist "Layer 2" cryptocurrencies: easier to exchange and representing a value in larger cryptocurrencies like BTC - analagous to a gold standard as an alternative to Fiat.
Other cryptocurrencies such as Monero improve upon the technology that was used to create Bitcoin to eliminate the need for layer-2s, simplifying business further.
Bitcoin is stupid, unusable and basically just a way to possibly get rich from other people falling for it. Cryptocurrencies as a whole probably shouldn't be dismissed outright. They're not ideal since the work used to generate them is non-productive, but this is better than the current system, right?
We're all familiar with the environmental damage done by Bitcoin miners, but some cryptocurrencies such as Chia attempt to work around this by avoiding using Proof Of (non-productive) Work in the first place, instead relying on time and dedicated computer space.
https://en.wikipedia.org/wiki/Chia_(cryptocurrency)
Do be aware that Chia was developed by Bram Cohen (need I say it?).
*: Of course new coins are mined+introduced, but with a set limit and "difficulty". Or, in the case of some cryptocurrencies, there is no limit but this is known by everyone using the currency. More cannot be magicked into existence when it is convenient.