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

I don't think if investors will be poor because of crypto. Because naturally investor must be ready to any condition of their investment. If someone loss and regret about their investment, i think he should study more.