Try to still report them to your local cyber crimes dept. - police
This will definitely be a good idea, as it might be easier for the authorities to trace those involved using the details that could be found on the site register, but I doubt if those scammers will be stupid enough to use their real contact information knowing that it could be used to trace them.
Name:Registration Private
Organization:Domains By Proxy, LLC
Street:DomainsByProxy.com
2155 E Warner Rd
City:Tempe
State:Arizona
Postal Code:85284
Country:US
Phone:+1.4806242599
Email:Select Contact Domain Holder link at https://www.godaddy.com/whois/results.aspx?domain=hitcoin.cc