Doesn't help--could just have your wealthy friend sign for you.

Your wealthy friend could also loan you 1M for a bank statement. There must be trust of some kind, no?

I believe that most people are wary of defrauding the United States government. It tends to throw the book at you when you do that.

Yes, we accept cryptographic proof of ownership for accreditation purposes.

How? On angel.co's accreditation form I only see a place to upload a single file containing one bank/brokerage statement. It says nothing about cryptographic proof of ownership, or even about providing multiple documents.

I think he meant "proof of crypto ownership" and not "cryptographic proof of ownership". So probably a screenshot of your balance on an exchange.

Generally, people with large crypto holdings do not keep most of it on exchanges, and certainly not on a single exchange.