Okay, decentralized currency is one idea. This can be used to implement some money with a monetary policy that is transparent and modified through consensus: eg bitcoin - deflationary via finite supply. Multi-party wallet is another. With this, cryptographic signatures from a majority of the owners is required to transfer currency/digital assets. Non-fungible tokens is another. This can be used to — as an example — publish land deeds and property deeds online and make them easily transferred as opposed to the current systems which are not fool-proof and are not as user friendly (look at selling a house and how expensive it is for no good reason). Or what about decentralized finance? A user can literally borrow money against Bitcoin without the need of an authority which can discriminate against him for no good reason. How nice is it that we can now operate such systems that are robust to censorship.

But you will just dismiss all these ideas. Same way people dismissed all the ideas people were imagining when the internet is young.

If you want to broaden your mind— just detach the idea of blockchain from the price of Bitcoin. Yes, it’s insane to the point of being obscene.