I have been holding both of them for about 1.5 years now, not fully but 1 years and 2-3 months.
Of course, I still have more bitcoin than ethereum but I find it easier to put "savings" into ethereum and money I earn and make goes to bitcoin directly.

So, I work and get paid, I instantly send 5% of it to ethereum, than I keep about 10% on bitcoin, than I withdraw all the rest and spend it, most of the time its enough for me, for the past 2-3 months I had to cash out almost all of it because I went to vacation and I had no money this year so I had to make a debt just for vacation (I know it sounds silly but I had to reset myself). After that I just went ahead and started paying my debts, I will be debt free in 2 months and will start saving again, putting 5% of all my income to ethereum and 10% to bitcoin.

From a trader's perspective, still BTC must be a good choice when considering the enough volatility to make use for their trading whereas ETH is not giving enough movements to make use it for profitable trading.