Buy bitcoin for all the money and wait for good entry points to altcoins. Perhaps they will fall even more, until they start to grow.
That's when they begin to grow in mass - you can buy them for a part of the funds.
To be on the safe side, this suggestion is cool but going in bitcoin with all the funds to me isn't the best investment strategy. 60% BTC 30% ETH then 10% for another altcoin say BCH or XLM (my best picks). ETH still has good news with its development, so we all can expect an uptrend (although nothing is certain).
Nothing is certain and it needs to be done correctly when picking good project to invest your money. If you can hold and wait it's really best to
place your money to bitcoin. If you can split, 80% for bitcoin and the remaining 20% is for the alt that you believe to have a good potential to
increase, majority should be place for bitcoin and wait for another 1-2 years. Don't rush and try to find comfort while patiently waiting.