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).
maybe this suggestion is good by distributing funds into things that should be done in my opinion. because if you put funds on one coin, of course the risk will be greater, and of course you do not have free funds anymore because all funds have been put into one coin. it would be better to divide the funds for investment and also free funds so that when there are coins that have the potential to be traded you can get profits there