We've got approximately 23 hours left until 1 August (the hard fork), and to protect yourself and your friends from losing their money, they should STOP accepting payments with Bitcoin.
DON'T MAKE ANY BITCOIN TRANSACTION VERY SHORTLY BEFORE AND AFTER AUGUST 1st UNTIL THERE ARE REPORTS THAT THE BLOCKCHAIN IS READY TO USE (After August 1st 2017 | 12:20:00 pm).
Q: What if i sent some Bitcoins to someone 10 hours before August 1st?
A: You'll lose your coins, you should wait until August 1st 2017.
Q: What if someone sent me some Bitcoins 5 hours before August 1st?
A: You'll not get those coins, and he/she will lose them. You should stop accepting Bitcoin payments.
[Please, Don't forget to spread the word]
For more infos : https://bitcoin.org/en/alert/2017-07-12-potential-split