Legendary trader sees ‘seismic shift’ in Houston’s oil patch For John Arnold, the billionaire philanthropist who made his fortune betting on natural gas prices, Houston’s fossil-fuel industry seems finally ready to move on. by Bloomberg Updated: 21/04/2021, 2:44 am John Arnold: reckons Houston's fossil fuel industry is finally ready to move on. Bloomberg Register here for the Energy Voice daily newsletter, bringing you key news and insight from across the global energy landscape. Thank you for signing up to our newsletter. Something went wrong - please try again later. Sign Up For John Arnold, the billionaire philanthropist who made his fortune betting on natural gas prices, Houston’s fossil-fuel industry seems finally ready to move on.