Perhaps finding a coin simply reminds you to pay attention.
Most people spend much of their day thinking about the past or the future.
We’re thinking about:
Work
Bills
Family
Messages
Appointments
Responsibilities
Problems
Plans
We may walk through a familiar neighborhood without consciously noticing much of our surroundings.
Then suddenly, a small coin catches our attention.
For a moment, everything stops.
You notice the ground.
You notice the object.
You become aware of where you are.
In this sense, finding a coin can serve as a tiny mindfulness moment.