Uh, What "concentration of wealth"? That would imply that the number of wealthy people is decreasing while their personal wealth would be increasing, and that's far from the truth, today the number of millionaires and billionaires is actually increasing, it is higher than ever, and the "disappearing middle class" myth in the United States is probably due to the fact that so many of them are actually moving -higher- in the social scale becoming part of the upper class. (The actual numbers are not hard to find, they are in the US Census) and accusing every single rich person on YouTube to be undeserving of their wealth is unjust at best.
As for supercar owners, uh, I don't know why singling out PewDie Pie, he's not a supercar owner, and for what I've seen, 1) Social Media influencers aren't the #1 supercar buyers, although they're probably the loudest and 2) I have no idea who are the 75 lucky guys and gals who bought a McLaren Senna, they're totally anonymus AFAIK, the same for the 100 lucky buyers of the GMA T.50 who specifically requested it to have a manual transmission (!) and those who have bought track-only specials from Aston Martin and Ferrari... you get the idea. These people are far from loud social media rich kids, and to me, they represent the modern supercar buyer, different but slightly less annoying than 1960s and 1970s douchebags Enzo Ferrari hated so much.
As for me, if I won the lottery tomorrow, well, I completely and utterly refuse to drive an automatic supercar (except MAYBE the new Ford GT) If I had enough money I wouldn't go for the GMA T.50 either because that car scares the crap out of me, same for old manual supercars I love like the Porsche Carrera GT, so I'm basically out luck, I've never gotten the appeal of luxury cars... so my rich "kid" garage would likely consist of a C7 Corvette, a Ford GT, a 992 Carrera S (manual, daily driver) and some car that teaches me to drive fast like a Subaru BRZ. And they'd be all over Instagram and YouTube. Ha.