I believe prices are inflated because of ICOs. People are buying tokens counting on ICO hype to increase their value so they can flip their initial invested principal with 2x/3x/4x return.
Without ICOs this speculative technique will not be possible so we will see how many people are actually interested in buying these worthless tokens because they believe in their "features", rather than speculate on their price.
I wonder though if the speculation will just move from China to other countries though and the bubble will continue until there is more action by regulators around the world against this.