This has been discussed several times and every time you think there is a pattern, suddenly it starts rising before the weekend.
I think it tanks more then it rises though, so it may be worthwhile to try and profit from this.
It usually tanks for most of the cryptocurrency market. It may not be all of them, but virtually most of them usually tend to drop in value over the weekend. Some traders have always used it to their advantage and I have never missed it. Wait for Monday afternoon and you will be swimming in some good profit and you can just find other few ones that are yet to make move up and get into them. Been trading this strategy and trend for a while now.
Falling prices on weekend is not new and I really cannot say why except maybe some whales always like cashing out at weekends and coming back during the week to push the market back up.
I have always tried to pick the best prices from a market for the week by weekends and most times, this is the time I always get to see an oversold market and once the week gets in, i start seeing my sell order popping up on some of the alts. It is a trend for some time now, and I am not sure it is one that is about to end.