Often times in pop culture when you see a prospector they're crazy, do jigs when they discover gold, speak in silly voices etc.
Here's an SNL sketch with one: https://www.youtube.com/watch?v=cKoIESw1tdM&ab_channel=SaturdayNightLive
I was inspired to write this post after seeing one on The Simpsons.
Where did this idea originate/who was the first "crazy prospector" in pop culture?
This previous answer by /u/itsallfolklore and /u/nada_especial might help. It references two main things - the historical reality, and the media image driven by actor Gabby Hayes.