Tether is a great place to sit out a drop as you can instantly jump back into the market when the time is right.
If you have the funds in a bank it takes days move it to an exchange where you can use the funds. USD in coinbase.com or something similar is OK, but then there is movement from there to where ever you want to trade. This incurs time and fees. Tether to anything (via ETH for example is very quick.)
I expect ALL coins to be affected (as we have seen) by the drop that will continue to accelerate. Quality coins will be hit as well, but they will be bounce back first. I want to be ready.