In Bitcoin's case of having small samples, that's all we have to go on : January 3, 2009 ( inception), December 5, 2013, Dec 18, 2017 & November 10, 2021. Take the number of days between each peak date, to extrapolate and guesstimate the next Bitcoin peak. Remember, guys on TERB are not day traders , just take profits and bail out before the last guy closes the door !Let's see. We have witnessed only 3 complete four-year cycles since 2009, when Bitcoin began. I'm sorry, but three data points does not a reliable trend make. Try again...