1. Whenever there is a fork BTC always tends to rise in price. It can be a good thing or it can be a bad thing. Personally I don't bother buying more BTC after it reaches a new ATH, I always wait for a dip - and a decent one at that. Patience is the most powerful skill anyone can have in this realm.
not necessarily.
forks can have very different effects on bitcoin and its price. it depends on what they are and how they are moving on with their fork.
for example SegWit fork caused a drop before it gained 100% support because there was a fear of a big split because of UASF. but then it went up when it gained 100% support.
the BCH fork didn't do anything. it causes some headache in the start because of hashrate stealing and the fact that many were moving their coins to safety before they dumped BCH.
3. You will earn the exact same amount of BTG that you have BTG, just understand that BTG will most likely be worth 10% or maybe even less then BTC until it gains traction.
again not necessarily.
the market decides what it will be worth. it can be 1 satoshi or it can be 10
BTC.
4. Yes, "is it will". Don't imagine being able to sell it RIGHT after the fork though, there will be congestion and it may take you a week to get it out after the fork. As I said just be patient.
i don't think there will be much congestion on BTG network though. most people don't act right away because of the risks so it is going to be a slow process. you can see BCH chain, they barely even had 1 MB blocks and only one 8 MG in the first weeks which was mostly spam for gaining media attention, not real transactions.
BTG difficulty adjustment happens on every block, so there won't be any issues with finding blocks either.
