I'm confused about the piggy bank.
Can you not smash it open unless you pay real life money to do so?
It only says, "Increase the amount of Yocash received when purchasing the piggy bank by spending Yocash in Yoworld stores."
How much yocash would you have to spend in the stores to purchase the bank and actually open it?
I currently have about 18 yocash, but if I'd have to spend the majority of it to get the 11 inside the bank, it doesn't seem worth it to me.

So I dont know the exact percent of yocash it puts in with each purchase but whatever the percent is that is how much it puts in with each purchase.

Yes you have to use real life money to open it to get the yocash.

The rate if it is filled is 11yc to 0.99 usd and that is the best rate for yocash there is

But again you have to spend real money on it