Simply, because he really believes bitcoin is a ponzi and that it's going to go to zero in the future.
We don't know what he really believes. As we agreed (I hope), what he tells can be true or can be false, we don't know.
Let's also agree that we cannot agree whether he has or not bitcoin

This guy is from the old school of money and only believes in the hard knock cash and gold.. That's it!
He even said in an article I was reading earlier today he told everybody who is holding bitcoin to sell amid this
suckers rally.
If you or anyone else think he will
ever change his mind about it are just dreaming.