...Another possibility is to evaluate the mobility in the ETH/BTC parity and obtain a profit margin on Bitcoin basis. In this way, since the profit will be earned in Bitcoin it will be possible to earn profit with the increases in Bitcoin price. For example, let's assume that 1 Bitcoin is gained with ETH/BTC parity. At this point, if there is a 10% increase in the Bitcoin price an extra 10% gain in USD will be obtained. In other words, in order to maximize the profit margin by trading with ETH/BTC parity both Ethereum must gain more value compared to Bitcoin and Bitcoin must gain value on a USD basis...
Yes, you will get an additional profit when trading the ETH/BTC pair if the market is in a bullish phase. But if you continue to trade this pair when the market changes to bearish, then your profit will be significantly reduced, and perhaps even reduced in dollar equivalent.