Is there a particularly reason why all Coins are dropping simultaneously this week? If you
look at the charts you will see a pattern
I think that because most of the altcoins are tied to the top 5 coins, and if you pay attention to the charts, most often they repeat the bitcoin chart with a little delay. With one feature, the dips are usually much stronger, because the tokens continue to fall by inertia, they do not have the credit of confidence, that the top 5 has.