What card do billionaires use?

Inquiring minds often wonder, "What card do billionaires use in their day-to-day financial transactions?" It's a fascinating question, given the wealth and privileges that often accompany such a high net worth. Do they opt for the convenience of a traditional credit card, or do they prefer a more exclusive and tailored solution? Could it be a specialized black card, offering unparalleled luxury and perks? Or perhaps they rely on a digital wallet, harnessing the power of cryptocurrencies for seamless and secure transactions? Understanding the financial tools of the ultra-wealthy provides insight into the world of luxury and privilege, and the question begs to be answered.