No, we don't want cryptocurrency-related questions, definitely so when they deal with these aspects of cryptocurrencies:
- Practicalities: How do I…? Why does this website…? Why does this program…?
- IT security: best protecting private key…
- Programming, version, options, compatibility…
- Theft, deception, social engineering, and other practices of the field.
- Economics: What's money…? How to make some…?
- Sociology: What are the criteria that people use to decide what they do…?
Cryptocurrency-related questions with a strictly cryptographic core, but that (without explanation or linked reference) use non-standard terminology (e.g. use "public key" for the hash of a public key), or nondescript terms ("blockchain" is a favorite), should be closed for vagueness alone. That's a common kind.
It's hard to distinguish if a website is legit or a scam, that notoriously can change any time or according to criteria like origin of request, there are precedents in the field, thus linking to a website on cryptocurrency incurs a higher risk of involuntarily participating in a scam than linking usually does. *Update, with an illustratiop: I initially closed this question as off-topic; then bowed to the argument that the question was cryptographic in nature, reopened it, and started to write the present answer. After days of investigation, the best hypothesis, which I have no reason to doubt, is that one of the websites linked in the question is a scam.
Among less clear-cut reasons that (in my personal opinion) we don't want cryptocurrency-related questions:
- Cryptocurrencies can be viewed as Ponzi or pyramid schemes, with cryptographic values possessing some arbitrary properties being the modern equivalent of tulip bulbs. There's no clear cut. Some of that may be illegal in some jurisdictions, and we don't want to participate in something that may be illegal.
- Some cryptocurrencies are wasting natural resources, which should be discouraged, if not outlawed.