That would all depend on how you hodl.  Are you using a webwallet, an exchange or some other type of third party service to hold your bitcoins for you?  Do you run a client?  If so, is it a full node or a lightweight SPV client?  HostFat has a work-in-progress guide here to be absolutely sure you're ready for any outcome and also have the ability to choose your desired chain if you happen to disagree with the longest one.