Bitcoin Pattern on the week of the last Friday of the month

The week containing the last Friday of the month has seen the price of bitcoin fall for the last 5 months. I think it's due to longs expiring on that day and price manipulation to liquidate them, but the reason it is happening doesn't matter to me.. I just see that it's happening.
If you buy bitcoin on the last day of the month and then sell it sometimes during the weekend that comes directly before the week of the next months last Friday ..and then either take profits or buy it back again on the last day of the month and repeat it.
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Selling in July after buying in June and making a profit was tight, but possible..all the others were easy money. I think this will continue until the shorts on futures and options are greater than the longs.


if you want to check the bitcoin daily chart here are the dates

Buy on March 31st
Sell on April 19-21

Buyback on April 30th
Sell on May 24-26

buyback on May 31
Sell on Jun 21-23

Buyback on June 30th
Sell on July 19-21

Buyback on July 31st
Sell on Aug 23-25

Buyback on Aug 31st
Sell on Sept 20-22

Buyback on Sept 30th
Sell on Oct 18-20