Is it likely that BTC price will dump as a result of split?
If people dump BCC for BTC and not for fiat BTC should continue to rise in price and not lose any steam past the $3000 mark. Supply and demand rules on each separate chain.
What if they both moon? Then when do we do?
Bitmain might shift their mining resources to BCC and start buying BCC and selling BTC to cover their monthly expenses. Pushing BCC up and BTC down on purpose. Then I think we could have the Double Moon scenario
Never trust a sleazy miner
If we have both BTC AND BCC then how likely is that both BTC+BCC=<$2900(Current BTC value)?
I just want to know if it's better to convert to USD before the fork.
BCC and BTC are separate entities. BTC + BCC doesn't automatically equal current BTC price halved after the fork.
What the price of BTC will be after the fork is
a gamble.