The fact that they've been minting billions of tether without collateral should make it abundantly obvious that this isn't a stablecoin and never had been. Anyone can pretend to have a peg in the good times, that doesn't mean there's really a peg or that the peg will remain in bad times. And if you can't count on the peg in bad times, it's not a stablecoin. If you've been honestly working on the assumption that it is…
A year ago I advocated this “riskless” strategy on HN… if anyone actually listened to me, would you be up 1,000,000% right now? https://news.ycombinator.com/item?id=26106281
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-...