When market is in crises the safest is to invest in Bitcoin as it is increasing it`s market share in those situations
and other Alts. are decreasing faster than BTC.
It seems to me that you have a sense of making this choice. As soon as all the altcoins are always following the King of the cryptocurrency, their price also depends on Bitcoin. Invest in BTC, it will be right.
Now the situation good for altcoins investors because the market dropped like a hell and all most all altcoins reached the bottom. So i think this is the best time to put your money in altcoins. I am talking about small investors those who can't afford to buy Bitcoins.