• Yes
• BTC will switch over to SegWit, BCH will not. Instead it has increased the maximum block size to 8MB from 1. Both approaches will increase the transmissions per sec. capacities of the chains.
• Compatable wallets can be found here https://www.bitcoincash.org/.
• I think it's rushed. I think it's bad. That being said; you could make some money out of it. Since very few exchanges accept BCH deposits almost all the BCH that's traded right now comes from BTC that was allready deposited at the exchanges when the split occurred. Therefore demand is way higher than supply witch is driving up prices. Also, the block rate and thus, confirmation time of the BCH chain is way slower then that of BTC. People are struggling to get their coins on the exchanges.

But if you want to make a quick buck, import your keys to http://www.electroncash.org/ if you don't already store your coins on Ledger, Trezor or BTC.com, than deposit them at https://hitbtc.com/. Bittrex et.c. don't accept deposits yet. Than you can sell them before the dip.