What do you use the coins from the piggy bank for? And why since you earned them do you have to pay

Penney

Why do you pay $2.99 to retrieve coins that you already earned.  And what do you use them for?

Lady_Choo

Hi Penney, 

I have a link here that explains how piggy banks work. Its not for bubble witch, but it works the same way in all the games, they just haven't written a blog post for it yet

https://care.king.com/en/blog/article/piggy-bank-in-farm-heroes-saga