Has anyone noticed that the price of BTC and ETH (which seem to be correlated) always goes down on a Friday, down more on a Saturday, then down to a low point on a Sunday before steadily climbing Monday to a high on a Thursday?

I have a theory that people need BTC on weekdays to get their drugs on Silk Road onion site so demand is higher through the week as they procure their powder for the weekend activities.  Everyone is sorted at the weekend and you can't get anything in the post on weekends so demand for coin goes down.  Until Monday, Tuesday, Wednesday and Thursday.

This is a definite pattern and I've seen it happen for weeks now.  Every week it's the same and it's already dropped really low today (Friday).  

If this pattern is true then there are short term strategy gains to be made by purchasing loads on a Sunday afternoon and offloading them on a Wednesday night or Thursday morning.  This is particularly noticeable with ETH with low/high ratio as much as 65%