I like it!

I actually think you should consider expanding this tool since you can make a profit from it by creating a limit for the levels of transaction visualization someone can get.
Businesses, governments, etc might find the pro version very useful.


As for the hosting, it seems like the tool is not working so consider moving it to a different host.
Also adding small features like 'different view', will improve the UX.

Example
https://anvaka.github.io/sayit/?query=Bitcoin


If you decide to scale this tool and run a pro version, you should keep it free for personal use. The crypto community will love it and it will help you to spread the word about it which will improve your traffic, domain authority, etc

Running blockchain marketing around this tool can also help you to spread the word around it. You can do all the marketing activities yourself from the beginning. Writing great blog articles, showing different transactions of big wallets can go viral on Reddit and other communities.

Good luck, and keep us tuned here for some new info about your development.