I would split my funds, as bitcoin seems to be more stable and altcoins are cheeper now, but there are many doubts as for their reliability
That is a good choice,split the fund and invest on both coins which is a better option than holding on a single coin.Bitcoin price is keeps going up and being stable om that side the altcoin is cheaper,some of the altcoins growth is very high but we don't know how long it will go.So invest on both and enjoy the profit in the future.