Theoretically what Vitalik said could also happen, even bitcoins could go to zero if they want. But I'm sure it won't happen, to much money involved and to many to make.
In words, it is very simple to say in words, but when it comes to reality the price of Bitcoin will not become zero because of a lot of money involved in the cryptocurrency. Till now, we have seen many governments try to destroy the Bitcoin price, but nothing happened till now, in the same way, it is impossible to become zero.