Maybe he just said it to prove that he is being optimistic about the things that can happen on Bitcoin.

It is not bad to become pessimistic towards bitcoin because you are just thinking of the possibilities and you don't want to hurt yourself expecting too much from bitcoin.

We should always consider its volatility because if you deny it then your views towards bitcoin will really hurt your feelings and can cause disappointments and doubts. Be mindful of your mindset towards bitcoin and making prediction is not that bad unless you make it depending on the the possibilities and reality.