This is because, you need a good supply of fresh offers to keep the audience. So if you end up to niche, you quickly become a job-ad-graveryard. Unless you scrap other big job sites automatically and somehow manage to filter and classify the jobs based on your niche.
I guess I'd like to see this job board refocus to be a curated set of jobs, that are chosen by a group of technical experts and those who are trusted to vouch for good company cultures. It may be that no cryptocurrency jobs get through that filter! That may even be an unwritten rule. But the fact that it's not the tagline of the whole site would hopefully make it more impactful in the long run.
After all the same thing could have been said about the initial rules of Craigslist, Facebook, and many other projects that started narrow.
For example, in my country (in the EUSSR), if you're a third country national and doing something related to cryptocurrencies you won't be able to open a bank account and fail the requirement to immigrate here (happened to a friend of mine). Similarly if you try to buy a house with money coming from crypto you won't be able to physically put the money into the bank for "compliance".
So you are already cut out with buying real estate from banks and corporations and you need to find a private buyer happy to accept to be paid outside of the country (if you send money to his bank in the country, he will be hit with the same compliance problems).
Cryptocurrency tries to solve a political problem with technical means and I'm surprised it hasn't been banned yet - but I'm sure it won't end well, in one way or another. Mind you, one way could be that it turns into ETH where government regulations cover validators (eg. they banned money coming from the cryptotumbler) - but then we're back at just your standard banking systems, with more hoops.
A thoughtless idea that expresses something you like, is still a thoughtless idea and can't actually attain the desired goal everyone involved says they want.
It doesn't matter how much you also don't like the thing that the thoughtless idea aims to combat. It doesn't matter how much we all agree that most crypto jobs are bad.
The reason it isn't is because it isn't needed. And yes this is due to frustration. But it's an actual solution to an actual problem, not a hypothetical.
If you’re fine with those, any generic job aggregation site works
Why are all cryptocurrency jobs excluded? Why aren't jobs around blockchain analysis for fraud or tax investigations allowed?
The result is a feeling that this site is an emotional response to an individual's frustrations, rather than a meaningful attempt to change the job market.