Not if they work for off-shore remote jobs, not anymore. Of course there are boomers who still need to have the physical bill in their hands, but the youth stays in crypto (either USDT or BTC or a mix of both). I personally like to keep my stack on BTC only, tough many keep it on USDT only.

People who earn in local currency, again mostly boomers, do keep their stack in phyisical USD only because it's really easy to get. But the youth use apps to buy USDT, tough most keep the money in local currency and use apps that provide yield in local currency.