void OnTriggerEnter(Collider collider)
 {
     if (collectionType == CollectionTypes.Coins)
     {
         CoinPurse coinPurse = collider.gameObject.GetComponent <CoinPurse>();
         if (coinPurse != null)
         {
             if (particles != null)
             {
                 GameObject initParticles = GameObject.Instantiate(particles);
                 initParticles.transform.position = transform.position;
             }
             coinPurse.AddCoins(value);
             DestroyObject(this.gameObject);
         }
     }
 }