Coins in a dream often mean a “change” needs to be made – or is being made – in waking life. The more coins there are, the bigger the change that needs to happen.
A quarter in particular may be connected to something in your waking life that is a quarter, 1/4, of something: 25 years, one of four children, a quarter of a mile, etc. You may have to put on your thinking cap and think about it in order to make the connection. But it will likely be something in your life right now.