Agreed.
My boss at the liquor store where I worked
left me, a minor to run the store( very illegal), while he went to the bank on Fridays
for $1000 to $2000 in cash to carry him through the weekend.
This was pre ATM, but even today there are cash limits.
This was a poor working neighborhood and people would cash their paychecks
so he was acting as a bank.
The customers had to buy booze, beer, or wine to get a check cashed.

In high school, I was the Monday night manager of an ice cream and dairy retail store -- nights when the regular manager had her day off.
We'd count the receipts and cash, then put everything in the big, honking 1930's safe. We didn't have the combo. Only the owner's wife who ran the admin office did. They'd leave the safe open for the night shift, and we'd be careful not to close it until we left. There was enough cash in it to make change on a regular night, but some weekends we had to find another local business with extra change who'd help us out after the banks were all closed.
Anyway, after a good weekend, we'd have about $5,000 - $7,000 in the safe. The admins would count the receipts and cash on Monday and make a deposit. So if anyone wanted to rob the place, Sunday night would have been the opportune time -- especially during the Summer when we had customers lined up out the door and around the building almost the whole day until just before closing at 10pm. We sold a lot more than ice cream. Frozen punch mix with big bottles of Ginger Ale, milk, OJ, eggs, popsicles, push-ups and other fun treats kids love, plus packaged ice cream in pint and quart sizes. Pretty much anything you buy in the dairy case of a supper market now we sold.
I don't know why anyone would keep $1,000 in a register. Most stores use a safe or hidden lockbox, and the register is left open after closing so some idiot doesn't destroy it trying to get it open.