What retailers actually accept zcash or augur or golem for example?
Retailers don't accept Litecoin or Ether either, and very few accept Bitcoin. No cryptocurrency will have its price based on its utility, ever. Their price is only based on the money that people hold in them, and utility is part of the reason why people hold money in it but they don't just put it in, spend it and be done with it. People also don't only hold money in PayPal that they're spending that second.
And yes, it's daily price changes.
And this is why BTC will remain number 1 as long as we don't see real use cases to pay with crypto for stuff you can already pay with fiat.
Sure, to make transnational payments to a relative or a friend, crypto shines, but how often do you need to do that? not very often. So most people treat BTC as gold. The rest of cryptos, just to speculate to make and hold more gold (BTC).
Once physical cash is removed, we may see a higher demand of BTC to use it in exchange of daily services. Until then, BTC is king as a gold alternative and will keep going up.
And some alts will make people very rich in a quick way, with the higher risk of getting involved in alts.