It's not decentralized, just a simple website built using Django. The idea is to host chat rooms for people (including non-technical folks) who are interested in cryptocurrencies. I'm still figuring out how to differentiate my website from Discord/Gitter.im and one of the ideas I'm considering is to have widgets that display the prices for btc, eth etc.

> but then it would be like Mastodon and already exists :)

Yup, IRC and Mastadon and a whole lot of other services exist but they are not easy to use for non-technical people. Web based chat is much easier to use.