Mozart wrote his first symphony at eight, his first opera at 14. There are some people who have something extra that most people can barely comprehend.
Doubtful. Finding such a hoard and reporting it to the authorities for formal examination by default means showing where you found it so the site itself can be examined by archaeologists. They'd likely be able to tell if you'd found more than you reported in the cache site. It's like forensics, but for ancient artefacts and ruins, pretty sophisticated at times.