There's ~$188B in Satoshi era wallets.

While ~$8B is huge news, due to the potential that all ~$188B might be in play, when most investors probably expected it was not prior to this - or at least the probability was low enough to barely factor, it's unlikely to crash BTC.

Further, moving BTC is one thing. Showing signs of liquidation is another.

That much should be able to get liquidated intelligently without moving the market.

It depends how it's sold. Market orders would have more impact than OTC .