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. 
No BTC will not reach to this level as this will be the extreme crash level and still there are so many BTC investors.If BTC reach to this price level then whole market will crash,which i think will not happen at all.