I think it tanks more then it rises though, so it may be worthwhile to try and profit from this.
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.