No, nothing in this thread is right.

Price manipulation is possible right now because volumes are low, but it will cost you more than it costs everyone else, so you'll lose.

The scenarios involving technical manipulation are entirely founded on misconceptions.  The network really doesn't work the way you imagine it does.  Someone would need several orders of magnitude more computing power than the rest of the world combined to pull off a block chain manipulation, and it would gain them very, very little.