His ultimate aim was the complete destruction of Bitcoin, and he almost achieved it. He ruined the lives of at least 50% of the Bitcoiners at that time (2013).
That's a set of thoroughly bizarre claims. And again, zero evidence.
I agree that as of now, there is zero evidence for this. But I hope sometime in the near future, his real intentions will be revealed.
And the claims are not bizarre. Just check the possible reasons why he should hide the theft of coins, and allow that to continue for months. Also, think why he rigged the Mt Gox orderbook, so that the BTC price went up to $1,200.