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.
The same idea. I think you can join in crypto world whenever you want. As long as you prepare enough knowledge and ready to join. Especially, this time is the best time for you to buy at low price.