5 years in.. still $0. When do you throw in the towel?

I think I'm destined to take the very long road to success and make every mistake along the way. I would like feedback from others who eventually broke through, but others who haven't should take this as a warning. Sorry for the length but the context is important.

For background, I've been in full-stack web development for almost 15 years (7/8 years freelance, few years employment). About five years ago I decided I wasn't going to let my dreams fade into the background any longer. I quit my job, cut down living expenses and moved to part-time contracting (10 hours/wk) so I could work on my own software.

Cue mistake after mistake. I spent a year and a half learning new technology while building a service that I never released! After a while I determined I wasn't that passionate about the space and moved onto my real passion: self-taught web development.

I started building my full-stack edu platform, working on one of the initial features which was a dev buddy matchmaking system. I had some decent interest from others, though the feature itself wouldn't be commercial. After a year or so of half finished features I STILL hadn't published anything. Here is an early view of the dev buddy form (doesn't account for the backend work on matching algorithm with ElasticSearch):

Then I got into investing/trading cryptocurrency as it started to take off. I was targeting very early projects for high upside potential. Being sick of not publishing anything I hacked together a weekend site which pulled market data from an API and added a bunch of filters on top by default to help me sift through. I shared it with a subreddit and it got some great attention! This gave me a lot of motivation to continue with it.

During this time I abandoned my edu platform as I had real users on a real application. People were even making money with it. I'm now 12 months+ on from that and have no subscribers, very few users (about 40 visitors/day), crypto looks like it may go into a decline for a while. The platform has expanded quite a bit and I feel like I am still trying to figure out what people will value enough to pay for. Seems many involved in crypto just want quick, guaranteed gains (paid groups), but MoonFactor is more about research tools for mid/long-term investing with a clear distaste for meme/shtcoins without utility.

About 6 months into it I did have a very generous soul give me $20k to continue development. I have also had a user pay for $2k over a few months to "sponsor" some features they wanted developed. I tracked subscription clicks on one of my pages and have had 40 or so clicks (over a long time, though). I feel like I'm being teased with viability.

For interest, here is the site: https://moonfactor.com.

Honestly, I'm lost. I don't know where to turn at the moment. I knew it would be difficult to build my own software but I did not expect it to be this brutal.

Is there anyone here with experience of successfully building a software product over a number or months/years? What would you do?

I have three major paths I am considering:

a) work on MF for another 12 months full force to build premium features, content marketing, etc, etc,

b) abandon it and move onto something else (either my edu platform or something B2B)

c) abandon the idea of my own software altogether and go full-time dev. One consolation is that I have had businesses reach out to me for dev since publishing my own software. This would feel like a devastating defeat, though.

Appreciate any feedback! And to others -- be very careful thinking everything will fall into place through hard work over multiple years. Build an audience, ask for money early and often. Biggest mistake I made was building stuff for free for a small audience expecting it to grow just because.