I wonder if he smoked a joint before making such a statement. If he finds cryptocurrency such a brilliant innovation, then why don't he has it or bought it? He only hold a bit, that was granted his from a friend.
Well, it can be because he does not need one as he is very rich and he is preoccupied with many other big things in life. Not all believers and supporters of Bitcoin are actually holding Bitcoin in the same way that not all Coke drinkers and loyal lovers do own any Coke stocks. Plus I think Elon is just expressing what his own opinion on this matter. So maybe let's leave things at that.