I had a very similar idea but never materialized it, a big bravo to you for actually building something and not staying at the idea level.

I assume you want to make some money out of it? Like the guy that made 1mil for selling pixels. Hope it works for you ;-)

A few questions that might help you… Are you going to be moderating/censoring text and images? What about companies using your chat to advertise? What do you mean by a permanent time capsule? How many years are the messages going to be preserved? Do you have a character limit on the message? Could see a hard limit.