How does sending $4 of cash to hong kong have to do with billionaires? Even as a poor person, I'm not stupid enough to make small-ticket purchases overseas.
Nothing; I was addressing this point of yours:
Small transactions: cash is faster and 100% secure (money goes from person X to person Y and is verified by counting in 10 seconds or less, vs. bitcoin's 20 minute block confirmation wait).
I'm not stupid enough to buy
big-ticket purchases overseas; but I've saved a fortune on small-ticket items that cost a lot more locally. I've bought loads of little bits from Hong Kong on ebay and never had a single one not arrive. Cell phone/laptop batteries, camera lens caps, flash cards, USB gadgets, etc. I had to use Paypal of course, but the merchant's coud have made an additional few percent on the deal if they'd have accepted bitcoins.