One thing is certain: have your bitcoins in your own wallet by 31st July. Electrum or HW wallets are fine for example.
Do not store your bitcoin at the exchanges, at online wallets, at casinos etc.
Most probably on 1st AUG you will be able to get the BCC this way and the BTC will be still yours. How to do it is still unknown.
Try to avoid transactions after 31st July until more is known.
My opinion: no big drama. There is altcoin forking off bitcoin and bitcoin holders have a giveaway. I am not 100% sure that the altcoin will have near to zero value. It is already traded at VIABtc at 20% of value of btc. So on average should be expected drop of btc value by ~20%. But it is hard to say if the combined value of BTC+BCC after 1st Aug will be greater or lower than BTC.
I speculate that yes. Bitcoin dropped to 1600 upon uncertainty. Then jumped from 1600 USD to nearly 3K during last days, when BIP91 (compromise solution for btc unrelated to BCC altcoin) was confirmed. There are still uncertainities, but the most important thing that there will be a Bitcoin with Segwit is almost certain.
I would not be surprised to see BTC+BCC combined value close to 4K. But take this with a reserve.
As I wrote numerous times, combined cryptomarketcap is nonsignificant. There are new altcoins created every day and they come to the market, so just that must by definition lower the market cap of btc. Even if some altcoin surpasses btc in marketcap, it does not say anything about the condition of bitcoin. The threat for bitcoin would be payments done in other cryptocurrency, especially payments for other goods. There are other cryptos being used like that (ETH, XMR, LTC, IOT), but nothing is close to cryptos.
Also worth of noting is that 2 biggest darkmarkets have fallen (Alphabay, Hansa), where owner of AB rather killed himself and most probably most of his bitcoins are lost (lost private keys). So another large part of bitcoins from 21M is as good as nonexistent.
Again:
One thing is certain: have your bitcoins in your own wallet by 31st July. Electrum or HW wallets are fine for example.
Do not store your bitcoin at the exchanges, at online wallets, at casinos etc.
Most probably on 1st AUG you will be able to get the BCC this way and the BTC will be still yours. How to do it is still unknown.
Try to avoid transactions after 31st July until more is known.
You do not need to do anything else for now. You can hodl both chains. You hodl both chains even if you do not extract BCC immediately, if you have the private keys of BTC (=seed from your wallet etc), because the private keys will be possible to use on both chains.
If you talk to God, you are praying; If God talks to you, you have schizophrenia.