1. That's illegal : He did not bring many proves here, just saying that since it has not been regulated as a currency, we were in a grey area, and something in a grey area is rarely something that will become totally white from one day to another. He added that the sole purpose of that was to buy all kind of drugs over the Internet.
he was wrong, Bitcoin is not illegal, it just has not been recognized governments. Currently, many countries have accepted this as showing us its legality. As a teacher, but he does not understand what he said. That is not good
2. It will crash : He said that he had studied Bitcoin's price evolution throught the time (what I doubt) and said her that being so constantly rising was a sign that it was not a viable project. Its proof : manipulated prices of things like silver or wheat are very stable !
it did not fall, it is extremely strong development and great achievements. As we see, it is occupying a very important position, the price is extremely large, yet not a match for money. His thoughts it is a mistake