You should have just left some of your money in bitcoin, I don’t really encourage leaving so much money in altcoins, your main investment should be in bitcoin, then leave some money in altcoins. Since you have been holding for two years, then all you should do is keep on holding. Seriously bitcoin price movement is what’s going to determine when we should be expecting altcoins bull run, so if bitcoin bull run can start, then we should expect altcoins bull run also, but if bitcoin is dumping, then we should know altcoins can’t be pumping.