Posted on HN a while back.
"To be crystal clear: every time you sell Tethers on Kraken, you are forcing Tether Ltd. to pay you in US dollars. If you can manage to sell enough Tethers for USD on Kraken, then Tether Ltd. will run out of dollars and this whole machine — which currently undergirds 70% of all crypto trading flows — will fall apart.
Well-capitalized hedge fund managers may wish to re-read the above paragraph, and ponder its implications."