Most of the peoples of this fourm know cryptocurrency means bitcoin.As a result most are involving to bitcoin trading.This correct that if bitcoin price down the altcoins price is down too because another altcoins based on bitcoin.
Yeah it is right because the market cap of bitcoin is very high and most of the people invest their money in bitcoin. When the price of bitcoin increases Altcoin prices also increases, and when bitcoin prices decreases, Altcoin prices also decreases. I think it is not good and both should be treated differently. There should be no link between Altcoin and bitcoin.