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It's not. Trying to sell it would crash the market. Still worth a lot, obviously.

• Scoundreller 4y ago
  Can he just pay off some kind of smart contract with it that ignores the provenance of the Bitcoin? Like, get a loan for $20b in a stablecoin with the payback being $21b in btc in a year?
  • mcast 4y ago
    If any of the BTC founder's blocks suddenly became active it would crash the price because most people would suspect someone found an exploit in the contract/hash or the keys were stolen.
    • Scoundreller 4y ago
      That’s fine when you’ve already locked the price into something else that’s not-btc. While you could sign a message with your key, you would still need something that accepts the proof but isn’t public, which might be possible with a properly structured/constructed smart contract, maybe?
      • squeaky-clean 4y ago
        The issue is finding someone willing to loan you $20B for your bitcoin without doing the research of how that would tank the price of bitcoin. It would be a great deal for Satoshi, but no other party would accept.
  • joelthelion 4y ago
    It's not just about the provenance. I don't think the bitcoin market can stomach a 20 billion sell-off, no matter who does it.