As we know BTC always moves in cycles, we've seen BTC in 2013 make about 1260% (ATH), and after 1470 days in 2017 again BTC made another (ATH) around 906%.
If my calculations are right this year, BTC will reach a minimum of around 300,000 to 350,000 (906%) from 20th to 27th of December which is 1470 days from the previous cycle.