This is a joke of the year that Elon Musk hold only 0.25 bitcoins. Even if he did not wanted to tell the truth he could have announced some reasonable amount. No one will believe that a millionaire is holding such a small amount of bitcoins.
Elon musk claiming he have 0.25 bitcoins is strange. Atleast he admitted of possessing bitcoins. That would make him poorer than myself. Elon is a intelligent person and a tech enthusiast. Has talked about bitcoin and Ethereum on several occasions. It would not be a surprise if he's saying he have 0.25% of all bitcoins.