So Warren Buffet is anti-cryptocurrency because he is the single most invested person in the current system. (One reason I think Justin Sun is an idiot.. Buffet isn't going to change his mind)
The Pharmacist termed it perfectly, Justin Sun like these publicity stunts and hence he is spending money to meet Warren Buffet thinking that he will be able to sway an old man into changing his policies and ideologies about investment in his late age, he made a fortune in the stock market but when it comes to bitcoin it is a different market altogether as you really cannot predict the growth.