The old coins

I accidentally find some old coins in my drawer.
It's just like find the time when people used the metallic coins in trade in the past.

Nowaday people who live in China like to use the Alipay to buy living goods in kinds of supermarkets.
Don't need any cash.
And i find a interesting phenomenon in process of paying the bill.
Supermarket counters often place some coins to give change.
Coins are used for giving change frequently.
But for the customers.
The coins are not easy to carry in the daily life.
They are soon lost sight of.
So maybe this is the reason why people choose network payment as Alipay.
It's just like this in China.
How about your living areas?
Thanks for your reading.