Precisely - there's a chance Craig Wright's bonded courier shows up with the missing pieces that allow him to produce the key necessary to access them ;) Hence:

> there are enormous BTC “deposits” that could suddenly cause a crash if they were used

Of course that Craig Wright thing was a hastily cobbled together lie he came up with based on Back To The Future, but there's still the outside chance the real "Satoshi" could show up and do something.