If the 4-year circle doesn't work again, you go for 8 years, or you can go for 12 years as long as you can hold until you have enough profit that you could be comfortable with and decide to sell.
 
I don't see any other approach that I can suggest; every other approach will be risky, as it will require you to either trade your coin, rebuy, use some reputable exchange holding offer, etc. They might be more profitable than holding for a long circle, but nothing is safer than having total control over your coins.