I think this is potentially a good idea for a blockchain app. You could use the Ethereum blockchain as your backend rather than a database. That way you don't h

I think this is potentially a good idea for a blockchain app. You could use the Ethereum blockchain as your backend rather than a database. That way you don't have to host it, and it wouldn't go down. You also wouldn't have to store usernames and passwords, users would just authenticate using their key pair through something like MetaMask. Users would also need to pay a small fee to send a transaction to update their post, possibly making their content more meaningful. I only have this idea because the Ethereum "hello world" app I'm working on is something similar but even more reductive: just a single shared blob of text that anyone can update. I don't think it has utility, it's just to learn the technology.