I have accidentally spent my keys so many times I've lost count.
Can we please have a secure way to hold our keys where they cannot be spent until you make a withdrawal?
It would be cute to have a piggy bank to hold keys.
For example, when you want to make purchases, i.e. rent a slot, you click on the piggy bank to make available your keys. When you're finished spending keys you activate the piggy bank once more.
A piggy bank icon could be visible to indicate when the keys are safe, and the regular key icon when they are available for spending.
Thank you for your consideration about this really frustrating issue of mis-spent keys.