The best thing to possibly happen when Justin Sun, with all his charm and wit, try to convince Warren Buffet about Bitcoin is that Warren will lend him an ear. As to Warren yielding into his convincing powers, it is impossible. This man appeared to have made his mind already. As to Donald Trump, well, Justin can easily sway him about Bitcoin. Donald is one man who seems to easy flip-flop.
I doubt that he can sway both Warren Buffet or the President here. This is nothing but a PR stunt for Justin as we all know he is good a "shilling God". Not his charm and wit will convince those traditional investors. Maybe they can have a discussions about crypto and Justin can present the cons and advantages of it, but at the end of the day, just a waste of time and money on his end.