Traditional finance is a much larger casino than the cryptospace so uncle Warren does not have the right to criticize us.
He or anyone else has the right to criticize anything and anyone if we live in a democratic society where every individual has the right to express his opinion. What's wrong is that after 10 years of his criticism of Bitcoin, you or anyone else still finds such news worthy of attention.
Heheheh in an argument when you tell someone that he has no right, it really implies that he is being unreasonable or unfair hehe. It does not mean that he really has no legal right hehehehe. However, yes he can tell everyone his opinion, similar to I have a right to share any news.