I don't think he was trying to discourage people from investing as much as showing them why they need to be careful and not invest more than you could afford to lose if you do. Essentially what I think will happen in the future is that big banks and companies will figure out a blockchain strategy then as always will line the pockets of politicians to regulate the industry. Most of the cypto currently being developed will be put out of business labeled as ponzi schemes. Logically you have to think about anytime anything threatens the status quo pockets get lined to put an end to it, right now they are sitting back watching the development of blockchain technology, once they can develop their own they'll go after what threatens them. That's the reality of it, you would have to be rather naive to think that the monetary system in place is going to yield or stop existing just because some guys came up with a new money system, no they won't, they will take that technology, develop it, regulate it and find a way to squash all the others.