Anybody can make a prediction, and it is even easier when you do so without any timeline. I can just throw out a prediction on how i believe BTC will reach $500k, and if it happens in 10 years time or so, people would say i was right, lol, even though i was just making a prediction without any rationale behind it.
CZ said this, a lot of people have also said the same thing, nothing new, we'll see what happens in the future.