To  rpietila's observations, I would add that Bitcoin has already seen an almost Satoshi-sized dumps of coins: USG auctioning off Ross Ulbricht's SR1 coins! He had commissions of something like 600k+ BTC and the US government announced it'd be auctioning off not just the SR1 hot wallet but also all the coins seized off his laptop, for a total of 173,991btc, or almost a fifth of the Satoshi estimates (!). The Bitcoin sky has not fallen.