No, they won't. HashGraph is a patented tech and many crypto enthusiasts critic such technologies. Personally, I'm not a big fan of technology that is patented by someone. Even if HashGraph is used to create a coin like Bitcoin, it will take ages for it to develop a commercial value. By the time it gets some market value, Bitcoin will be much ahead in terms of the market share along with a few other good coins. The technologies will not even compete with each other. At the end of the day, it's upto the users to decide which tech they're more comfortable with.