I see the market cap of Ethereum is going down day by day. Could someone explain what is really driving down? Is it due to market FUD or sth different.
It is going down just because the bitcoin is facing massive dump. The rest of the coins whether it is ethereum, neo or any other altcoin, they are completely relying on bitcoin for the rise in their market values. This is the major reason why you are observing downfall in the prices of ethereum too. This is not permanent at all, with the passage of some time, ethereum will rise following the leader of crypto market.
I don't believe in your idea that the drop in bitcoin is the reason etheruem has dropped this much. Bitcoin drop could have effected altcoins including etheruem no doubt but my point is, etheruem has fallen more than the effect of the drop in bitcoin. I'm yet to know the reason myself.