After all the years I'm still having trouble comprehending what Bitcoin - and Bitcoin in specific - is useful for aside from speculation. I get that Ethereum and several other cryptocurrencies have the ability to execute code on the blockchain, enabling useful applications, and that stablecoins could be used for everyday payment due to it not fluctuating wildly (at least in theory). As I understand it, Bitcoin has neither of those characteristics. Can someone enlighten me on what it can be used for then?