Before u started be sure u extracted most valuable bitcoin forks:
https://steemit.com/bitcoin/@pieczywo/how-to-extract-multiple-bitcoin-forks-easiest-and-fastest-way
Bitcore BTX (02.11.2017 block 492820) 1 BTC : 0,5 BTX
https://coinmarketcap.com/currencies/bitcore/
1. Backup your bitcoins
Create new wallet and send your bitcoins from old to the new one. For fast and easy use i recommend https://electrum.org/
2. Export your private keys
You can find multiple ways to do this e.g.
To export a private key from your Bitcoin-Qt / Bitcoin Core client:
Launch your Bitcoin client
Click on 'help' in the menu bar (top right)
Click on 'debug window'
Select the 'console' tab
If your wallet is protected by a passphrase (i.e. you have to enter a passphrase before you can send) unlock it by typing
walletpassphrase "your walletpassphrase here" 600
dumpprivkey [your Bitcoin address here]
This will return the private key which will start with the number 5
3. Install Android Emulator
If you have not-everyday-use Android phone or tablet skip this point.
This one is simple and very easy to use: https://www.bluestacks.com/
4. Install Coinomi App
https://play.google.com/store/apps/details?id=com.coinomi.wallet&hl=pl
5. Claiming BTX with Coinomi Wallet
In menu click "+coins"
Select "Bitcore"
In top-right corner pres "..." and select "sweep wallet" and paste your priv key (not all keys from may are working)
6. Selling this tokens
Crytopia allow trading BTX to BTC and then to any other cryptocurrency with low fees without verification.https://www.cryptopia.co.nz/Register?referrer=gremlin000
Here are some other markets accepting bitcore
https://coinmarketcap.com/currencies/bitcore/#markets
In the future i will add more instructions.