Sort:  

Bitcoin is still the coin with the biggest network effect and brand and most people enter or exit the market through it.

Some traders just enter altcoin positions to end up with more BTC.

It is the most tested coin and if it should fail for some reason there would be a long winter for the rest of the market.

Prices are pledged to BTC somehow like oil to the dollar...not sure if this is the best example though...

I cant beleive every time people start selling bitcoin that everybody across the whole spectrum starts selling off... I think this has something to do with bots on the exchanges that causes this... early last year there was clear differences in the charts between coins.... No they all look and act exactly the same.

The bigger sell offs last year had every coin drop as well

when the market falls, the smaller one crushed at the bottom.

Coin Marketplace

STEEM 0.29
TRX 0.11
JST 0.033
BTC 63458.69
ETH 3084.37
USDT 1.00
SBD 3.99