I prioritize altcoin which is on the 10 CMC list to hold. But I split 60% for altcoin and 40 for holding bitcoin. Altcoin and bitcoin are very, very important. The price of altcoin depends on the current bitcoin trend, which is currently unstable. Having bitcoin will save your assets and minimize losses when altcoin drops very deep.
Understanding the risk of your invested money can give you an idea of what you do when certain movements is not favoring your investment. Splitting and not to put everything to one basket definitely the best options to do. All things can be done if you are well prepared and you extend your time studying the market trends. Both options are good if you are willing to take the risk.