Bitcoin has had a rocky week to say the least. At its lowest point, the cryptocurrency dipped to $9,200 before a rising green candle sent it scurrying back into the safety of five figures. That candle was sparked by the release of $100m worth of tethers – surrogate US dollars – and was followed by another $100m issued for the next three days in a row. Tethers are propping up the bitcoin market right now, but what happens when the music stops? Should regulators wade in or Tether shut up shop, the loss of fresh capital could be cataclysmic.