Last two week ethereum only have price about $130 and right now bitcoin have raised up above $181 and will be more higher, why not to buy and invest your money in ethereum because you will get much profit later.
maybe they think differently so they don't buy Ethereum and maybe they buy another Altcoin, because they trust their choice more.
now Bitcoin and Ethereum have increased quite well but now they are down again and maybe later he will rise even higher.
it's not too late for people who want to invest because Ethereum will go up so much that you can get big profits.