I think it would be a great idea to make a human mine-able crypto currency that rewards people who work on indexing genealogical records.
This is a tedious thankless job that requires several steps that no computer can automate.
It would be great if all these volunteers could be rewarded like this.
For more info on how indexing works:
https://familysearch.org/indexing/Designing a process that can be done by humans but verified 100% by computers in cryptography without botting is a difficult task, I'm working on something along those lines and it's more complex then most people think.