When both bitcoin and altcoin price is going down, it only means one thing. People are cashing out their money. You can see the ecosystem going on. When the price of bitcoin in terms of dollar is increasing, then altcoin prices are going down (in bitcoin terms) and vice versa. But if both of them are going down, then the fiat money supplied is going down.
Apparently someone sold $839K worth of bitcoins. (
Source) It's pretty annoying seeing people talking that ETH is starting to take over when in fact ETH is just crashing as much as bitcoin does. There's no competition going on at the moment, really. People are simply cashing out huge amounts of money.
all tokens are going down, its going to be a partey for those who wants to earn more so when bitcoin is dumped, they have to move to bitcoin too so when it retraces back up, the more profit they get. btc rise fast but its a coin not a platform like ETH. i prefer eth as it could rise fast and cheaper for now.