The media effect is now taking it's toll on crypto currency. When craze began at the end of 2017, everyone wanted to be in crypto and make millions. Slowly, it has began that people are realizing their crypto is now over valued and selling.

You would expect this kind of market where certain things were announced like, higher taxes in crypto. You could also see a drop in single coins when failures are recognized. In this case, it's the Media Market that is finally ending.

Which crypto is effected the most?

The most widely available and popular coins gained the most value. Not everyone could buy alt coins easy, hence why they are less effected by this. Check out https://coinmarketcap.com/ to see current trends for the past week.

No one wants to lose money

You have a choice to buy, sell, hold. Right now it isn't a buyers market. More people are selling which is driving the price down. Buying now would only lose money until this media market is over. Then you can either sell, which would be at loss for some people, and potentially buy a less popular yet just as good coin. Or you can hold and hope they come back from the drought.