I would prefer both but i will give many value to , because there are a lots of altcoins that born every month. And their price will raise or go down in one-day. It's so difficult to choose a potential altcoin. Hold it is more save.
Yeah same like me. I prefer investing bigger amount in bitcoin and some extra amount to some altcoins, as we know when bitcoins are going down, some altcoins tends to go high, but there are few also who followed the chart movement of the bitcoin, that is why for me i am choosing to invest both bitcoin and altcoin as long sa you analize also which altcoins have potential of rising in the future. But of course for now i decided to invest more in bitcoins because i see the money in there.