I think this saga is a cool example of a trade.
You can put together some of the pieces just from marketdata, but the details seem mysterious: why is BTC/USD rich on BFX?
And then you realize you've read 300 tweets this month explaining why (who) and didn't think twice.
Conversation
There are lots of other pieces to the story, including the relationship between USD and USDT, fiat withdrawals, trading fees, BTC storage, futures, and interest rates. It's actually really nuanced!