also, 3 wallets, with $30 million in? someone needs to not be so trusting of cutting edge tech, that's just ASKING to be hacked just to see if it can be.

I'm rambling here, but my wild guess is that those wallets were not belonging to individuals, but probably to some groups / businesses. With the abundance of ICOs these days, and with the need to make the contract address public in these ICOs (where else should people send their investments?) it's pretty easy to track these types of accounts. It would probably be more time consuming to track individuals accounts, although relatively easy, from a computing point of view.

So I suppose we're talking about ICO money. Again, it's just a supposition, I might be wrong.