The coins are a thing. They are plural-named. The indefinite article is "a handful of". The description is "You have a handful of coins."
Understand "handful" and "money" and "coin" as the coins.
Instead of dropping the coins:
say "Better not leave your coins unguarded. They'll be gone before you know it."
Instead of putting the coins on something:
try dropping the coins.
The hint list of the coins is the table of coin hints.
Table of coin hints
|"Coins are traditionally used to buy goods and services."|
|"There aren't enough coins to buy drinks."|
|"There's something else you can buy."|
|"You can operate the jukebox by inserting coins into it."|