You are stuck in the monetization part of your side project. Its not that your side project has stalled, it is that you have auto-piloted it without adding alternative monetization strategies.

As relix mentioned, you also need to cut costs too.

If I owned this project, I would probably pick it up again and try to add some new niche to it and find some other revenue sources.

"just under a million tokened users" I don't know if this is means almost a million users or not, but that is a massive audience already.