If the corrective wave 4 is concluded, and it looks like it is, the target for BTCUSD is minimum $6000.
If the correction is not over, then what is wave 4 for now, will become wave A, and we'll see wave C going below $3000, then wave 5 will proceed with slightly lower target.
The structure of BTC movement during last years is perfect, textbook .
Wave 5, that Sheba Jafari of Goldman Sachs was referring to was only the internal wave of wave 3 visible above. CNBC also reported on her analysis on Mon, 14 Aug 2017. You can check it out.
Here I present the bigger picture of what she was talking about.