Will I invest - Yes. As much as I disagree with another split, I can definitely see a bull run within the first few days; until it will more than likely level out. Keep in mind, this will ultimately depend on adoption. If its unprofitable, miners won't support the network. Also, price is speculative. In my opinion, invest in Bitcoin as you would and just take your free coins when they come. Bitcoin will prosper, Gold will end up as another alt just like Cash.

As for how much to invest. Well that is on you. I can only recommend that you never ever ever play with your bread money. "Know what you own, and know why you own it." - Peter Lynch