Earlier quoted context omitted.
Absolutely do not do this. Do not bet against the house inside casino walls. If you have enough capital to weather potential dislocations, the only real way to play this is to be long off shore (perps, probably) and short CME. This position is long BTC/USDT vs short BTC/USD, the net of which is short USDT/USD. The reason for doing it this way is if it doesn’t play out, or goes to 100k first, you’re just wearing a bit…
I don't entirely understand this; could you provide a concrete example, or actual trades, that could be involved in such a position? (I'm just curious how it would actually look like in practice.)
CME: short $1m BTC futures (which are dollar settled and thus BTC/USD)
On Binance you are long BTC, and short USDT. On CME you are short BTC and long USD (implicitly on the fiat legs).
So if we add that up, the BTC positions net off and you’re just left with short USDT and long USD which is the desired outcome.
In practice, if Tether implodes I would expect everyone to sell Tether (by buying crypto with it) and then due to panic, to send that crypto to exchanges with fiat off ramps where they will then sell it. So the price of BTC on Binance goes to the moon, and the price on CME collapses. You will likely lose whatever money you had on Binance (your profit is denominated in worthless USDT and Binance is probably bankrupt at this point) however you should make multiples of that with your CME short.
This is all of course not investment advice and extremely hypothetical.