A historically profitable bitcoin BTC $ 63,897.59 trading rule, built around the cryptocurrency's four-year halving cycle, is pointing toward another potential buying opportunity. The "500-Day Rule," popularized by Pantera Capital in 2023, suggested that investors would historically have profited by buying bitcoin roughly 500 days before the halving and selling about 500 days afterward. “Bitcoin has historically bottomed 477 days prior to the halving, climbed leading into it, and then exploded to the upside afterward,” Pantera Capital said in a 2023 report. “The post-halving rallies have averaged 480 days from the halving to the peak of that next bull cycle,” the article added. A bitcoin halving is programmed to occur every 210,000 blocks, or roughly every four years, cutting the number of new bitcoin awarded to miners per block by 50%.