Almost every laptop bought these days has an express card slot. unfortunately, this slot usually goes unused. If you laptop comes with a "dummy card" in the express card slot, you can use it to stash emergency money. Most dell laptops come with a plastic "dummy card" in the slot, which is perfect for the following instructable. I used a dell inspiron 6000/e1505 as my laptop.
Step 1: Fold the Money
Firstly, fold your money into a square/rectangle that will fit under your card. compare the folded bill to the space under it. the following fold should be fine for most cards. if not, fold your bill a different way and modify the next step accordingly.
for my dell dummy express card, i had to fold my Canadians 20$ in half 3 times. check in the pictures.