I was listening to the Adam Meister show today on the World Crypto network, and he referred back to his show from one year ago, on March 17, 2017, in  which Vinny Lingham came onto his show, unannounced and predicted that bitcoin was going to then hardfork and go down to below $500 or some other such nonsense.  I think that Vinny lost quite a bit of credibility from the strength of his conviction on that date, but the strength of his conviction did cause several bitcoin HODLers to sell and to fail to buy more bitcoin during what ended up being the 2017 low price of bitcoin at about $890-ish.

2 hour YouTube presentation of Adam Meister show from March 17, 2017 - with surprise guest Vinny Lingham who predicted BTC prices were going to crash to below $500 after hardfork

Even though it is a 2 hour video, it has a certain importance in bitcoin history, and shows that credible folks can make strong predictions and stir up disagreement that end up being wrong.