coins are geo tagged, and if you pick someone's coin from somewhere there is communication link created between you two, and vice versa.
idea of the app is to be generic not just dating, but yes dating is one of the use case.
user can drop a coin and pick a coin, and the places they usually goes to is attached with their interest, eg: cafe, pubs, gallery, museum, church or some event. so more likely you gets to connect with like minded people.