As the title says, Why are Altcoins traded with Bitcoin or Ether and not with fiat directly? Newbie here and needs to get some questions cleared up
I don't think so, In my exchange site, You can trade for Bitcoin, Bitcoin cash, Ethereum and Ethereum Classic for local currency. I think it depends on your exchanger. I do believe, it's because a market cap of bitcoin and ethereum was above other crypto thats why both of this crypto are available for trade in local currency in every country. The other also said that's why everytime bitcoin price jump, alt will slide. It's because alt are compare with bitcoin like dash/btc, ltc/btc etc, So when the bitcoin price soaring, the alt price will follow their value in bitcoin, and what we see is down.