You need to get your coins out of Coinbase right away. They announced that if bitcoin splits, they won't let you have coins for the other chain.
Let's say you have 10 bitcoins, and bitcoin splits into 2 chains. You will have 10 bitcoins on each chain for a total of 20. However, if you have them in Coinbase, you'll only get the 10, and they'll keep the other 10.
There will not be a split on 99 %.
How mining pools are signaling is not necessarily where the hashpower is going to go Aug 1.
50% of mining pools STILL signal Bitcoin Unlimited...what does that tell you?
Very informative!