I think there's a chance that someone with that holdings exists somewhere but for sure they wouldn't reveal their identity for the sake of their safety. Everyone wishes that they could be that person, someone who has the highest faith on bitcoin that managed to believe for a decade without getting shaken from all the doubts and negative views about bitcoin. Maybe there's below 1% of people who owns bitcoin during that time was able to hold it up until now. It sounds impossible actually considering that bitcoin experienced a lot of bull run already, for sure at one point you would be tempted to sell your holdings. If someone actually did it, he's rich as hell right now for sure.