rather than pick it up.
Whether you follow that tradition is entirely a matter of personal belief.
There is no scientific evidence that tails-up coins bring bad luck.
In reality, the coin landed that way because of ordinary physical factors such as:
How it was dropped
Its shape
The surface
Air movement
How it bounced
Its final point of contact
A tails-up coin isn’t a prediction of something bad.
Finding a Coin Can Be a Reminder to Notice the Present
There is another interpretation that doesn’t require any supernatural belief.
