you said it runs every 4years ? then count 4years from now , the next bull run should be on the year 2024 but there is no assurance to that and i dont even know that every 4 year is the correct cycle of bull run because i dont memorize the historical chart of btc . i joined on btc on the year 2017 thats why this was the only year where i remeber the last bull run occured and theres nothing after that except from this currenct year 2020 so that was 3 years gap all in all not 4 . in my own view , the next bull run should occur on the year 2023