After my visit here today, I can witness that this nice GC is not present in GCQC5K. It is obvious that this GeoCoin has been lost for more a year. Nobody has logged even Discovered It since it was dropped here in June 2017. Two months later geocacher yaroushek posted a note that "it was not in this cache".
In February 2018 geocacher Kocour v botach discovered the GC. He wrote in Czech exactly: "Seen with JASI 21. Thanks" There is chance that Jasi21 has it still (or had it in inventory during February). Jasi21 found GCQC5K on 2017-07-22, while he/she absolved crossing of Krusne hory/Erzgebirge. Be sure to ask Jasi21 (https://www.geocaching.com/p/default.aspx?guid=f1735d19-32b8-4919-a584-d51ace0ee650&tab=profile#profilepanel) immediatelly about your GeoCoin!
Unless your investigation is successful and because now the trackable can be wherever, but absolutely not here, that is why I ask you, Qrank, for marking it as "missing". There is no reason for leaving it here "virtually". Thank you in advance.