Hash rate is 90+m terahash and increasing, good luck R&Ding the chips and obtaining enough to achieve. Retail pricing is around 3k per 50 TH/s, and that is just for hardware.
Sure, naked shorts are bounded, but a naked short is not the only way to profit from the decline of an asset.
And really, if you’re talking about limiting cases, you’re bounded by what your counterparties are good for, and by what your relevant regulators will let you get away with (or, depending on who your counterparties are, how far you can go before you end up in a ditch somewhere)
