OnTriggerEnter2D Rapid Fire

Hi Jeremy here and to keep it short and sweet my code(code below) is inside an OnTriggerEnter2D function, but when this gameobject(other) hits a gameobject with the tag coin as long as they are touching it fires off the code inside the if statement. Which in this case spawns like 100 particle systems and adds over 100 to my scoreValue? I only want the the code inside the if statement to fire off once everytime it hits another gameobject?

 if (other.tag == "Coin")
 {
     var coinBurstClone : GameObject = Instantiate(coinBurstParticles, other.transform.position, Quaternion.identity);
     Destroy(coinBurstClone, 2);
     // Add a point to the current score when coin is hit and also update high score if its lower then current score
     // then disable renderer and it gets renabled when it repostions in Coin Spawner Script
     Score_Control_Script.currentScore += scoreValue;
     other.gameObject.renderer.enabled = false;
 }