Much better to wait until the fork happens and when you receive the free coins, sell it. But take Ethereum (ETH) and just hold it for a longer time if you believe that it's a good coin because IMO, I do believe that its a good coin to hold.

Hold before the fork happens and sell it later on. There's no need to be worried about it, what are you thinking by the way? are you thinking that these forks will do something to your coin and can lessen the quantity of it? Btw, Nowa and ETCV forks are likely to be a scam fork but there's one fork which is real (Constantinople) and its said that it will not be giving or creating a new coin because its main purpose is to upgrade.