Stacked pile of cash for robbery chases?

Since I have seen the movie Masterminds on Netflix, I thought it would be a cool idea to make a mod that just looks like piles of stacked cash. I want to weigh down a van in the game and I just don't think only planks will do the trick. I want to weigh the van down with an object lighter than planks, about equivalent to the weight of stacked cash.