A new version of bitcoin is about to branch off tomorrow. The bitcoin Segwit2x (B2X) hard fork will be set at block 501451, on 28 December. The B2X fork will increase block sizes from 1MB to 4MB.
Prepare for the fork.
Do not keep your BTC at coinbase, you might miss out on the free forked coin.
Make sure to hold your BTC in a wallet where you control the keys, so you can reedem your B2X, sweeping your old BTC keys. (electrum, mycelium, jaxx, ledger, trezor. ect)
Enjoy your free coins :-)