If it is true according to Gizmodo that Dave Kleiman
kept a heavy-duty USB drive on his person at all times. Paige believes it might have been made by the brand Corsair — which boasts that its products are encased in “an anodized aircraft-grade aluminium housing.” If he really did possess a Satoshi Nakamoto-level fortune, it may have been sitting on that drive.
Also that his business partners
Paige and Conrad recall watching him type in 40- and 50-character passphrases to access his devices and files
So if wallet.dat containg 1 million Bitcoins was on that USB then we can assume those coins dies with him if he never revealed his pass phrases to anyone.
http://www.gizmodo.com.au/2015/12/the-strange-life-and-death-of-dave-kleiman-a-computer-genius-linked-to-bitcoins-origins/Also an error in the Time article
Indeed, there’s a mysterious cache of 1.1 million Bitcoin, worth about half a billion American dollars as of this writing, visible on Bitcoin’s public ledger.
The largest wallet on the Blockchain is 169,732 BTC