Several parts of the world, buying with cash and no mortgages is totally normal. The funny thing is many Americans think how we do things in the USA is how things are done everywhere which just isn’t the case.
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The US runs on credit, the rest of the world still run on cash. One thing when traveling abroad that I realize is almost everyone uses cash, and the habit and convenience of running your plastic is just not there. It does take some getting used to. But thinking about it, my convenience of using the card here is built on the financial fees levied on my less financially savvy fellow Americans.