Harry needs to tell him.
I'm still curious how Harry ended up broke in the first place. He also should've been buying himself food (at least PB&J).
Maybe Harry should take one of his sickles to a coin dealer and get paid for the silver. That would net him more than some of those other jobs he's doing.
Author's Response: I should think the wizarding world has laws about selling wizarding coins to Muggles. For all we know the coins have "Wizarding Currency" stamped on them. Though to be honest the reason Harry hasn't considered it because I the author didn't think of it. Perhaps in a re-write I'll add it in (and credit you), but it's a bit late in the narrative now.
Thanks for reviewing!