Tether is a big reason btc got to 20.000, if you look at the chart you can see when tether started getting pumped btc and all altcoins rose with it.
This is the only interesting thing that you said in there (because the other stuff is shit)
Anyway, at some point, TETHER will collapse, they can not sustain that anymore, and it if collapses, i am sure that bitcoin will drop by more than a 20 - 25 percent.