I can not understand why it is not used. If BitUSD or Nubits were used
It could accelerate a lot of trading bitcoin, giving much life to Bitsquare, making purchases and sales faster, capturing the value of Bitcoin at all times.
BitUSD could be bought or sold, using SEPA to pay, without worrying about the transfer time, since they have a very stable value.
For example Bittrex uses Nubits for Bitcoin trading.