Hi,
Hope this finds you well; being solution providers for enterprise email delivery/high volume email delivery, we managed large databases of email records, by industry and geography. And this includes your targeted niche crypto as well. I can help you with lead sourcing, but, currently can't work on CPA model at this stage. Let us know if you are interested to purchase an email list targeted to your niche. We can provide you with valid, valued email data.
Thanks