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correct. They will just not be recoverable at that point.

If this is true:
From the 1814400 BTC awarded, 1148800 BTC has never been spent (63%) - should be the amount of BTC Satoshi mined.

THis is a decent amount of BTCs :)

On other hand, its still dangerous to have that many BTCs possible accessible by a single entity. Dont want to think about the price drop, if he would suddenly "recovered" his private keys :)

We actually know some of his addresses :), they were the first ones mined :P