How low do you think the price of BTC will go? How much will the new coin be worth?
I expect Bitcoin to be around $6000-6500 and Bitcoin2X at 0.2-0.3
BTC.
I had a guess that if you're planning to sell your BTC to fiat it is better to do it a few days before the fork when the price peaked rather than waiting to sell the B2X for extra BTC then selling it all to fiat. IIRC this is what happen on Bitcoin Gold fork.
I Think the price of Btc will dump below 5000 usd then it will be growing up again.
Possible. I honestly prefer this scenario rather than keep going up too fast. It's too thrilling and the fear of huge dump is always upon us when something going up too soon.