Every time have you start for joining and participated at investment of crypto currency is always correct time, you can joined every time you want because is always correct and the best time, you can take profit with buying lower price of altcoin and sell it at higher price.
There is actually never a wrong time at all. It is only wrong when you are approaching the market with a wrong notion and mentality, but when it comes to the maturity of the space, this is still a very young space with great chance for a huge level of increase in the future, so one way or the other, it is pretty obvious that if you want to get the best from this space when it becomes more matured, you should still be getting in now. We are still much in the early stage of things, and early adopters always get to receive the best. I believe in the next few years, some people will wish they even join by this time. You will see!