I can see why it might seem like a good idea, but there if a potential to lose out doing it that way. Hodling in the event of a split means you get coins on both chains. Selling before the split means you have to buy back after the split and choose very carefully which chain you think has the best chance of survival. And if you take too long deciding, the fiat price may well recover to a level above the point that you panic sold.
It is obvious that you are not a (very experienced) trader (or not a trader at all)
Selling bitcoins before the split would be a wise decision any way you look at it. It is almost a certain that price will crash after the split (even if temporarily) or even before it (if it is really going to happen, due to insiders cashing out), so the risk is not worth it. If you don't know which camp to stick to, you can buy back both coins at cheaper price, and thus you would be better off overall than if you decided just to hold. I guess I won't have to explain where exactly your logic fails. It should be straightforward
Cool story, please sell your entire stash now, then. I'll also be buying when it's cheaper, so I'll have my original coins I'm still hodling,
plus the coins I buy on sale. You'll just have the coins you bought on sale and a few more fiat IOUs. We'll see who fares better in the long run. I have no interest whatsoever in exchanging my crypto for cash or some pretend numbers on a bank's ATM. I may well ride out the storm by daytrading some alts, but fuck fiat. I would only ever exchange crypto directly for products/physical assets/services and even then only at the point where my purchasing power is huge. I'm going looooooong on Bitcoin and burning through my fiat before it becomes worthless.
//EDIT: Also
This is a poorly disguised, too obvious and easily seen through attempt to postpone the inevitable end of mining as we know it today (i.e. highly monopolized and heavily abused). The only possible explanation if Wu and Co are actually going to get done with Bitcoin is Jihan going totally nuts, which is unlikely. SegWit and further updates will surely eat away at his profit margins but they are pretty wide anyway to deliberately go for something as suicidal as creating a Wucoin. In fact, I wouldn't be surprised if Jihan denounced his actions later as intentional trolling (to save face)
And this is what I've been telling many times myself, namely, that miners (Jihan Wu's puppets, specifically) will leave no stone unturned to escalate things further (to keep things where they are now). But I don't think that they are really going to stake everything when the time comes to decide and actually follow their decision. This will just turn out the same bluff as it has always been the case before with miners and the stuff they have been proposing
For someone who is always there at the drop of a hat to point out everything that's apparently wrong with mining in their "expert" opinion, I have to ask, have you actually
understood how mining fundamentally works yet? Because there's still a pretty big question hanging over that if I'm brutally honest.