Just to be blunt, everything will disappear in time, not just cryptocurrencies. Regardless if bitcoin will survive or not, what matters is the technology that powers bitcoin- which is the blockchain technology. If he were to be true, another cryptocurrency would surely dominate and reign on the market in terms of price, which would be the next bitcoin in the market. The endless cycle continues as this would be the future outcome of the market once this event happens.
I don't think he has any in-depth knowledge about cryptocurrency, bitcoin, and blockchain and I think he can't even distinguished the difference between the three. And if there is anything that could stop cryptocurrencies, that is not going to be government agencies. I think as long as there are a lot of people who are going to benefit from it, there is no such thing as possibility.
Nope. He is very knowledgeable about these. He has decades of experience in investing on various assets and currently he is the chairman of Rogers Holdings and Beeland Interests Inc. In the past also, he has made several statements regarding cryptocurrency. But that doesn't mean that we should always agree with his assumptions and predictions.
Well if that were to be the case, better maximize the potential of bitcoin as a short-term investing program due to its high-volatility. Although he may be experienced in this line of work, no one still knows what would be the outcome of the market.