Of course it is. Sweeter prices than now probably not worth waiting for. Perhaps the prices will fall a little more, but with the accuracy of a cent to determine the time to invest fortunately impossible. But we can say with certainty that investing now, you will not lose.
Yes, starting an altcoin investment is still good to do, but you need to consider the potential of the project you are interested in. Slowly the price of each coin starts to rise little by little, you can start now by choosing an altcoin that is in the top position.