I don't think they can store such a value at a bank account, their whole business is shady and hard to explain. Also it was meant to be redeemable, means that you could transform them back to USD, which would cause your USDT to be destroyed, yet it seams no USDT was ever destroyed. Nobody would redeem it? Not even for curiosity? Suspicious, to say the least...

Sorry if I didn't properly explain myself, my point is about BTC markets. Due to this "magic money making machine" the market could be inflated and in the verge of collapse as soon as Tether collapses, a MtGox part 2.0.
Do you think this is a point of concern or the exchanges on "Tether steroids" won't be able to hurt the market?