on the toss of a coin
Left to pure chance; based on a flippant metric.
ADJ
copper, gold, silver | antique, rare | commemorative | counterfeit, fake | penny, pound, etc.
VERB + COIN
issue
mint, strike
The government decided to mint a new coin to celebrate the country's anniversary.
flip, spin, toss
We flipped a coin to decide which restaurant to try for dinner.
collect
COIN + VERB
be in circulation, circulate
Many rare historical coins still circulate among collectors and museums around the world.
clink, jingle
The coins clinked loudly as she dumped her change into the piggy bank.
COIN + NOUN
collector