Fibbonacci extension says 1.61 extension would be 20k which is right around the previous all time high which would make sense.
If you want to trade this, recommended entry targets and stoploss are as follows
Entry- Above $16,500
Target- $20,000(21% gain)
Stop loss- $15,250(7.5%)
Approximately 3:1 risk to reward ratio.
If the price does break up, with the ichomoku signals etc, I wouldnt be surprised if bitcoin surpasses the previous all time high.