What sprays out one coin every once in a while onto the board?

When you don’t accept the offer from the bubble it becomes a coin (I personally fill my board so the coin goes up top and I gather a lot of coins so I can merge them and have more coins)

When you merge and they give you and offer for that item… weather is free with ad or you have to pay with the Crystals… if you don’t take the offer it becomes a coin! I personally fill the board up everything (maybe with storage items) then it’s gonna go on top that way it fills up and I can merge them and get more coins rather then 1😃