I think we should wait longer to invest in Altcoins. Because there is a lot more time left for the next bullrun to come. So why are you in such a hurry to invest in Altcoins? Also the market is gradually falling. I think the market will fall further. So we should be more late to invest in Altcoin.
How sure are you that their is enough time before bull run will start, that's what always kill lots of people they keep on saying market will still fall more which is not always true, nobody knows the bottom and nobody knows when the bull run will start. My advice is if you are planning to invest in bitcoin or other altcoins, we know most coins are down by - 50%, but if you are still scared then divide your money into four parts and buy stage by stage, you can use the first to buy at the current price and wait for more dip and buy whenever their is more dip and incase their is no more dip atleast you are also holding part of the coin and you will miss out completely.