I honestly have no idea who this Kevin O'Leary is
He's a Canadian venture capitalist. He has appeared on bunch of investment related TV shows such as Dragons' Den and Shark Tank.
people who say that must also think fiat is not real money and think the only "real money" is cash. because at this day and age 90% of times we are not using anything physical and everything has turned into digital form with credit cards, wire transfers, payment processors and online wallets.
People don't appreciate this though. The vast majority of money doesn't exist in any tangible way, it is just numbers on a database. Banks frequently essentially print new money out of thin air by altering these databases. But because you
can withdraw this money and hold it as cold, hard cash, people think it is more "real" than bitcoin, despite bitcoin being the only one out of the two that you can't just create by adding a few zeroes to a spreadsheet.