To me the situation of a '51% miner' is much like a government printing money - when they do, they get to finance their budget deficits as they get to spend the money first (when prices haven't changed yet). However, when that money gets into the system and people realize there's more money in the system, it leads to inflation that reduces the value of the currency (much like the reduction in the price of BTC). What stops a selfish miner with 51% mining power from double-spending like crazy in the short term before the price of BTC has had time to react, then pull out of BTC altogether? Then there would be no loss of wealth that the whitepaper says disincentivizes greedy attackers?
Thanks for your response in advance!