Currently BTC prices have been hovering at 6000, and if the BTC prices fell to $5000, $4000 should be not far off, the market is confirmed in the bear market, want to rise to $20000, you may need a couple of years.
In my own opinion, the price of bitcoins will never drop below $4k dollars because there are a lot of people right now who are investing so there will be higher demands in the market today which will never makes the price to drop at $4k.