If you have 50,000 pennies then you have $500.00 which is a lot of pennies and you would need to have a counting machine count all those pennies.
Some banks will use the counting machine to count the pennies for free if you deposit all the pennies into your savings account or checking account.
100 pennies equals $1.00 and 30,000 pennies makes $300.00 so 50,000 pennies would mean you would have $500.00
I would hate to count that many pennies by hand or even take that amount to the bank so I would be depositing the pennies before I saved that amount.