I agree with those who support your manager's request that you use a car to transport money, particularly with CCrew. I think that it's more secure to transport a large amount of money with a car. The fact that this is to transport my employer's money would make it especially understandable for me to make that personal sacrifice. It sucks to read, but I hope you go ahead and accommodate your employer's concerns at least until you find another job or work out some other solution if possible, probably a compromise, over friendly, professional discussion in the future.