Most of the investments that people made were in the late december 2017 when the price was in the highest point. Its not hard to predict that it will fall eventually as the growth in 2017 was purely speculative and not backed by any significant situation.

Right now all you can do when you  want to make big bucks is to invest in the long term. In few years the market will be cleared of all the altcoins that dont bring any value and the cash will be transfered to the ones that hold value. That might happen in two years and it will be the time of market consolidation when the prices will rise.