Atlassian does not have any affiliation with any crypto currencies. Could you explain why you are posting here about it? Did you by chance receive an email from an atlassian.net or atlassian.com domain about a crypto-currency? If so, could you please share with us the sender of that email?
There have been past examples of malicious users sending spam from our sites. However I cannot find any record of you receiving any email from Atlassian Cloud sites in the last 30 days at least.