The first two runs ended exactly one year after the mining reward halving.
E.g. December 2016 => Dec. 2017
IMO it will be the same this time, May 2020 => May 2021
So we shall assume the price the BTC will have in May will be the maximum for this cycle?
Should we sell in May?
If you need money then selling in May is good but if not, then wait for another months because bitcoin is having the possiblity to reach until $100k this year. Don't miss that bigger chances, and if you ignore that potentiality I guess regrets will affect your whole being. Always remember, we can't easily get over when it talks about finances.