Can you give me insight, do you think trading via ETH/BTC is more profitable than ETH/USD? Please give me an advice.
Trading using the ETH/USD and ETH/BTC methods is the same, the profit you get is not based on USD/BTC, you can get profits based on ETH price movements, the profit of USD/BTC for you is the change value, when compared with the value of USD/BTC just the same.
If you ask which is more profitable trading BTC/USD with ETH/USD, there may be an answer, which definitely depends on how many percent BTC and ETH rise.
Your question can be said as a partner, not a profit, those are two different things, a partner and a different version of profit.