Wise people say that there should be the right time and the right place for a project. I have definitely chose bad time for the MarrySign project but it took some time and research effort to realize that.
First of all, I started the project in the middle of the so called crypto-winter, when stocks were low and a few scandals were destroying peoples impressions over crypto and blockchain in general. You might say - you just needed to persevere until it's all over. I don't think so because people's skepticism was not the only negative indicator.
I found a guy here on IndieHackers who worked on a similar idea a few years ago and when I asked him why he abandoned the project, he answered something like: "Because no one needed it."
After talking to potential users I also realized that I was solving a problem which might not exist. The real pain was caused by divorces and not by bureaucracy and conservatism of the existing marital approaches.
To continue this row:
To sum up, it was a good experiment which was worth it. I've acquired some new skills, worked with Blockchain, talked to potential users on Reddit and in other places, got experience in applying to an accelerator. But now it's time to switch to something else.
P.S. Thank you all for supporting me and the MarrySign project!