Your idea was basically to short tether at high leverage and wait. But margin trading with high leverage isn't free. You are essentially borrowing the money at a very high interest rate.

For example, at Kraken the margin cost is currently typically 0.02% per 4 hours. This is not something you want to maintain while waiting for an event that could take years to materialize. And that's for modest leverage (up to 5x), I imagine it's even more expensive for the 100x leverage you were looking for.

https://support.kraken.com/hc/en-us/articles/206161568-What-...