Is it safe to take out a tongue piercing for good after the first day?

If you decide you no longer want the piercing that is fine. Never remove a piercing till it has fully healed. The Tonga is a muscle and requires adequate healing time do not remove for 3 to 6 months. It will try to heal as soon as you remove it, as well as cause major infection if you take it in and out. It is an open wound and the mouth is a dirty place...