I wonder if this event is tied to the Ethereum split early in development, a lot of hurt feeling there. Everyone fears a this type of event when a coin is significantly pre-mined/pre-owned. A similar event could happen if the Satoshi BTC wallet ever cashes out. It is huge, and was earned during BTC development when BTC=$0. Lets hope that the private key was destroyed to protect the currency as a whole. Time will tell. As far as I know, the only currency with stakeholders locking funds is DASH, where 4500+ master nodes have staked 1000 DASH each. Effectively locking away 4.5million DASH of the 7.4million mined so far.