It's wrong to throw something valuable.
Erin has worn her current diamond ring for three years but spots another one in a jewelry store she likes.
Erin wants a new diamond ring.
Erin buys the new ring and wears it alongside her old ring as well.
Erin throws her old ring in the trash and buys the new one from the store.
Erin never misses her old ring and feels happy looking at both of them.
In time Erin comes to miss her old ring and needs money and wishes she would've sold it and is depressed.