I do not think of tether as a cryptocurrency since it is backed by fiat but there have been many doubts that each tether is backed by one dollar as their creators have stated, this has profound ramifications if true, all of those that are using tether to take refuge of the difficult market conditions could lose everything if it is confirmed that they have been lying, for such a coin the most important factor is to keep the trust of their investors and once they lose that its price could crash to zero.