Most likely a scam. I've never seen any ICO with their sale active that are still not showing/providing any details of their team. They lack customer support as well. I checked their thread and they're not responding.
Domain was also registered just a month ago:
Domain Name: ZIRCASH.IO
Registry Domain ID: D503300000144481118-LRMS
Registrar WHOIS Server: whois.godaddy.com
Registrar URL: http://www.godaddy.com
Updated Date: 2018-09-19T06:32:07Z
Creation Date: 2018-09-19T06:32:06Z
Registry Expiry Date: 2019-09-19T06:32:06Z
Registrar Registration Expiration Date:
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: email@godaddy.com
Registrar Abuse Contact Phone: +1.4806242505
Reseller:
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited
Registrant Organization: Domains By Proxy, LLC
Registrant State/Province: Arizona
Registrant Country: US
Name Server: NS43.DOMAINCONTROL.COM
Name Server: NS44.DOMAINCONTROL.COM
DNSSEC: unsigned