Yep the USD is definitely in a bear turn now.
Just look at EUR/USD its been collapsing for 4 years now, and it hit very low support zones, all based on the rhetoric of the FED of raising USD interest rates, which it wont.
If truth gets out EUR/USD will get pumped back, and possibly BTC/USD too as the calamities in the market will have a + favor for BTC!
People often forget, that FED isnt concerned just about inflation but about China too - and those guys are notorious for manipulating Renmimbi. Raising interest rates would put US companies at disadvantage.
I didnt really watched the china situation, but i know that basically the FED is begging the PBOC to leave them alive. They are rivals but they are in this together, China owns most of US bonds, and China has most exports to US (although they are strategically repositioning themselves already) so its their common interest to have a strong economy.
I bet the FED guys were frightened when they saw the Chinese stock collapse, they though that if China has market problems it might sell their US T bonds, and then the FED would be in big trouble.
Either way this is only a cat-mouse game, and QE4 will happen eventually, so USD will be sacrificed to save the US economy.
At which point BTC/USD can be not 400$ but 400,000$
