Here's a pretty good diagram with counter-arguments you can use whenever someone throws a criticism of Bitcoin at you. It's a fairly old tweet, but still pretty useful.
I have realised from the unset that Michael Saylors's approach to bitcoin has been somehow biased and his arguments have always lacked the statistical evidence to take him seriously.
He has been a manipulator, who constantly takes advantage of Bitcoin's potential in private and publicly discredits Bitcoin at every chance, so best to just ignore this dude, and focus on personal knowledge building that will help each and everyone to make better decisions as regards to bitcoin.