Interesting thought you got there @sponge-bob. I agree to some extent of most if it, because yes that kind of volumes are not possible at the moment, although manipulation with bitcoin are a common things today.

Mining companies pumping it
People Bank of China putting it down again, just a few examples.

In the bigger picture i honestly do see it as a good thing, since it more users; be it investors or the common man, makes bitcoin attractive for new groups. And yes the ETF will be a new perhaps the final step to regulation, so far it can be regulated offcourse ;)