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.
This means that Bitcoin would still the number 1 pick of all investors and crypto users. And besides, Bitcoin is highly accepted than of the other coins available in the market even compared to Ethereum. And we can't deny also that, since from the start Bitcoin have already gain trust and its getting a lot of numbers having interest in this. Thus, ethereum won't have chances to take place over BTC.