This year will be a bit different than the last year. Normally, the lows are a lot higher than the previous year because the highs and lows happens during the middle of the year, this year the peak was at 2017 December and then it all went down from that hitting as low as 3.2k on November/December levels and then hit 3.4k but than the new year started.

So, because of the bad timing the 2018 low will be 3.2k as far as I know and the 2019 low will be 3.4k but since we are going up now the 2020 low will be a lot higher probably as long as it doesn't fall once again. That is why even the yearly lows are not showing how much bitcoin usually goes up every single year if you take the yearly price average and see how much it was most of the time during that year then we can talk about how much it goes up every year.