It is not least effect but high effect of whales participating in bitcoin more than altcoins. The demand and supply of bitcoin is high and for altcoin is low. The demand of altcoins whole have high but because high transaction fee couple with the congestion made many investors to leave altcoins. And they have loss enough investors. And from onset many people don't like to invest altcoins because of the nature they portray in the cryptocurrency world. So many investors of cryptocurrency see altcoins as shitcoins. And if you look at the cryptocurrency market cap, you will discover that, many investors in altcoin since last year have not gotten any profit and now that the market is decreasing or going down, they are losing again.