If I lose a level, I am offered 5 extra bubbles for 9 bars. Can I use bars my Piggy Bank?

Hello @DarthVader and welcome to the community!!! Just for future reference, this section of the community is for Candy Crush Friends Saga. If you need help navigating to the Bubble Witch Saga community, just go the “Games” tab at the top left corner of the screen. Here should appear a list of all available King communities. Just scroll until you find the community you’re looking for. Anyway, to answer your question, the gold bars in the Piggy Bank are only usable if you pay the stated amount to open the piggy bank. The gold bars that are usable are the ones that are stored on your account, not in the piggy bank. However, it is by no means mandatory for you to open the piggy bank if you’ d prefer not to. I hope this answers your question! Have a great rest of your week😁