Bitcoin prices dropped to make the altcoin price to be very low and even 500% lower than the price of ico, which makes many investors experience a lot of losses. not a few investors who become poor because of it. is it true that bitcoin affects the price of all altcoins 
Bitcoin's influence with whole market is completely right at this time. This rule may be changed in the future when BTC Dominance goes down and price gap between Bitcoin and Altcoins is pulled closer