First, a warning: these two coins, BTC and the new BX2, are about to be in direct competition for the same miners' support, so there's a real chance one of the coins could end up worth zero. So unless you're totally bitcoin savvy, the safest thing to do is to hold onto both coins and just let the war play itself out.
1. What?
On November 15th or 16th, BTC will "hard fork" into BTC and BTC SegWit2x (B2X). A "hard fork" is when a coin permanently divides itself and its value into two separate coins, operating independently into the future under two separate sets of rules.
If you own BTC on that date, you’ll be eligible to receive a free, equal amount of B2X. So if you own, say, 1.5 BTC, you’ll be eligible to receive 1.5 B2X.
2. When?
The blockchain ‘photo’ will be taken on taken on Block 494,784, which will probably be mined on November 15th or 16th, depending on mining speeds. Here's an updating countdown: https://bashco.github.io/2x_Countdown/
3. What do I have to do to make sure I get my B2X?
The best option is to move your BTC to a Safe Exchange that automatically credits your B2X to your account without you having to do anything (see the list below).
Alternatively, you can move your BTC to a private wallet where you have control the addresses' private keys like Electrum, Airbitz, Bitpay, Blockchain.info, etc. But the drawback to the private wallet approach is trading of B2X will probably begin immediately on the exchanges, but you won't be able to participate because B2X won't be moveable on the blockchain for a certain amount of time after the fork.
3A. Safe Exchanges -- These have declared they'll award B2X to their clients without their clients having to do anything at all.
1. Coinbase: https://support.coinbase.com/customer/portal/articles/2892985-segwit-2x-faq
2. Bitfinex:
https://www.bitfinex.com/posts/223
3. Blockchain.info -- Blockchain's actually a wallet, not an exchange, so while you'll definitely be awarded your B2X, you won't be able to move B2X to an exchange for some time after the hard fork, meaning you won't be able to sell your B2X for that period of time.
4. GDAX --
https://blog.gdax.com/timeline-and-s...d-83778344949d
3B. Unsafe Exchanges -- These have declared they either might not or definitely won't distribute B2X to their clients.
1. BitMex:
https://blog.bitmex.com/policy-on-bi...-forks-update/
2. Gemini:
https://gemini.com/blog/upcoming-bit...ge-operations/
3C. Undeclared Exchanges -- These haven't announced a position yet on B2X distribution.
Bitstamp, Bittrex, Poloniex, Kraken, WhaleClub, and others.
If anyone hears of any of these exchanges, or any other exchanges, declaring a position on B2X, please post it.
4. How Much Might the New Coin Be Worth?
Futures markets are currently valuing B2X around $1200, which means if the fork happened today, BTC would come out of it around $6000 and B2X around $1200, but futures markets have a pretty crummy track record at predicting hard forks accurately, so who knows?
5. A Final Thought.
If and when Bittrex and Poloniex declare for B2X, they might be the best places to have your BTC for the fork, especially if you're considering selling your B2X. This is because those two sites have the lion's share of crypto folks interested in alt-coins, so during the window of time between when B2X trading starts and when B2X can be moved around on the blockchain, they're likely to have the highest prices.
At least that's what happened last time:
https://www.sportsbookreview.com/for...x-opinion.html