Prices are Down!!!!

I get why prices like BTC, LTC, DOGE ... go down but why ETH?
With ETH! you can actually do something it has a real value.
And steem?
What is wrong with steem that 'investors' punishes it because BTC goes down.
it's starting to get time that BTC disapears and blockchains appear that acctually do something useful.

Source: coingecko(STEEM - 7day period)
Source: coingecko(SBD - 7day period)