If you're referring to a bubble pop and you don't trust the coin then the only thing you can do is sell. I would go onto an exchange with the highest amount of traffic and maybe you could find an idiot that would buy it
Bitcoin price rises and fall sometimes so there's no need to worry about. However, if price continue to fall maybe that's the time you sell some of it if ever there's an interested buyer then you keep some when the price gies high again. What you need is trust to what you are doing is right and patience to wait for the right time.