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 
Of course the price of Bitcoin influence on the whole market prices very much, and lots of people and I am as well lost even more than 80% of assets after the decrease of market, but it is not the onliest reason of losses - some people lost because of scam projects, some because did not act in the right way when the market started decreasing, some projects made their tokens frozen and so on. But of course the key moment of all our losses it is the low price of Bitcoin.