I know that ETH could not win and take over beyond BTC, but BTC is currently falling right now, do you think Ethereum could win incase BTC falls into abyss consecutively all day?
I wouldn't consider the current dumps as bitcoin falling into the abyss because there are far more lower prices than it in the past. In fact, the price range ATM can still be considered a good enough price if one had witnessed market being below sub 1000$.
Just a quick statistics I calculated, Bitcoin and it's investors for last 365 days have got a return of investment of 224% i.e. more than double of what they invested while for the same time for ethereum, it was just 137%. Bitcoin investors are gaining more than ethereum investors.
Comparing bitcoin and ethereum merely by gains alone is not good IMO because it is irrelevant to the whole market capitalization as a whole. What matters is it's use cases in real life and how many services accept it as payment.