That is the point, if you want to make profit on bitcoin deeply when the price decrease is and opportunities for you to invest huge, because definitely the price will raise and you will be profitable on it.
It depends on your time between entry and exit and if you enter the market in a bull run, exit in a bear market, you will get loss. If you do oppositely like enter in a bear market and take profit in a bull run next cycle, you will get good profit. Most people enter in a bull market when Bitcoin appears a lot on social media so they likely stuck in a bear market and only few of them can stay calm, keep up their belief in Bitcoin and hold untill a next cycle and bull run for taking profit.
So invest for 3 to 4 years and you will be profitable on bitcoin, because is the best coin and if you are patient enough you will definitely achieve your goals. I can says when bitcoin drop investors can just used the advantages and top up there bitcoin investment when the price raise. they will get double profit, is only traders can get more benefits.
History says hodling time is about 5 years and a little bit more to get profit.
https://hodl.camp/