Depends where you live I guess, but it's not a crazy thing to do and I know a lot of people who do it. I myself rarely take more than a couple thousand over a border, but mostly because I'm afraid I'll misplace it or lose my wallet or something.

Seriously, you can easily spend $500 a day in San Francisco on restaurants and bars for two people, without going to anyplace really fancy.

Yes, but most people would use a card.

But at the same time you would probably be comfortable driving a car worth $5000 a kilometre from your home.

I would not equate cash and a car one is easily stolen and disseminated.

I know carjacking exists but stealing untraceable cash versus a car is quite a different situation to me.

Plus I can drive really fast in a car but for the cash I'd have to be able to run faster than the other guy.

Cash is traceable, each bill has a serial number. Totally agree that cash is easier to use after theft, but there is a huge market for stolen vehicles. They can be taken to a chop shop or even just loaded on a shipping container and sent to another country.

Somebody doesn't need to pull you out of the car, that rarely happens as compared to somebody stealing it out of your driveway or public parking while you're not nearby or asleep.

You can also easily see that somebody has a vehicle, but unless you run their pockets first or they're flashing it around you would not be able to know how much cash they have on their person or if they have any at all.

What makes you a target for robbery is not what you have on your person, it's what you display on your person. Nice clothes, pulling out an expensive phone, having a nice car, pulling wads of money out of your pocket or being intoxicated or otherwise unobservant will all make you a good mark.