I agree that we don't know the person but if he could buy something like billion dollars equivalent of Bitcoin then it's considered that he's a whale too. I believe there are billionaires out there that we didn't even know – yet they invest in Bitcoin because they've seen a great potential of this crypto currency as an asset valuable such as gold and diamond. I bet people who knew him would eventually follow and support his decision about how Bitcoin is an innovative creation.

Besides we do have a lot of richest man in each county we are living but most of them didn't take an effort to announce their selves that they've bought Bitcoin in the first place. Sooner or later the message will scatter to their fellow business partners, I guess this is a start again of making a new ATH record.

This is predicted to happen right now, but in the past, they ignored the potential of Bitcoin in our communities, now they are seeing that's its price is increasing and the profit is already in their mind. Or some other popular person wants some attention because its trending

I think most of the richest person already have some crypto but they just want to keep it low back then and now that the crypto are being trendy they are making a huge wave to make it bloom some more.
I think there would be more who would come out of it and make an announcement or put it on their bio in their social media accounts.