If you think that's something to bang your head on a wall about, spend a week on the streets of any major city--NYC, Chicago, SF, LA, or wherever--take your pick...
After enough panhandlers, psychos, off-their-meds outpatients and miscellaneous freakazoids hit up on you, you'll learn and you'll start quickly walking right past all
of them--while keeping half an eye on them to be sure you don't get stabbed in the back with an icepick as you walk away.
And... that doesn't even address:
1--The 99.9% probability the "silver dollar" in question was made in China---out of base metal and then plated with nickel (or maybe even silver, if you get a good one).
2--The possibility that the "silver dollar" is contaminated with who knows what. Basic personal health and safety considerations mandate never accepting anything from
ranting street people.