Another good content from you David, I have been following you in youtube and twitter. You gave me an idea about Steeemit and now here following you :)
About Tether, the kind of volatility that we are facing today nesseciates the need to have Tether kind of coins. Basically, the amount I am ready to take risk can be invested in other crypto as investements. The remaining amount can stay as Tether for any future purchase. But if there is a problem that there is no underlying asset(1 usd for tether) as it is supposed to have, the hodlers are in real trouble as there would be sell off and eventually the value will go down. The whole purpose of this coin will be void and in future any coin comes up will be doubted.