Trust me, that is what they will continue to say because the market that got hold of their emotions. I believe the time he wrote it, he must have been in loss and was pushed to make that statement. If he comes back to see his post again, when the price of bitcoin pumped above $9000, he might be blaming himself for not taking that opportunity to buy some.
The truth of the matter is that crypto will continue to be a strange thing to those who are new t it. We learn every day.