I read “hot girl surfer” at first and was kinda confused.

Depends on. In Germany for example, you get a “Finderlohn” (Finders Reward) for Reporting your find. You would get at least about 3% of the total summ. Sometimes its more. I would assume Belgium has something likewise.

If you think about the troubles of transferring probably illegal gold into money without raising attention, its worth a thought.