I mentioned in my reply that one of my clients has tried it and never gets any return on investment. If you ask me, I had tried myself, then definitely yes. Probably I have used something like MailChimp to push the email marketing. But as I told you, the response isn't enough to get a return on investment. Even if you use crypto leads, it's still unrealistic email marketing. No one will trust your mail.

You haven't answered how you have collected the mails and how you make sure these are crypto emails. Can you please show some inside status about your mail campaigns? You can just add on to your announcement, so you don't need to reply to each user here. We may see from your post about some existing campaigns results and projects that get a good return through your email campaign.