Bryan Johnson doesn't think you should drink coffee. Josh DeAngelisThere's a new mantra in the corporate world: sleep > caffeine. "Sleep is the new coffee," longevity enthusiast Bryan Johnson told the Journal.Experts say workers who sleep more are likely to be more productive and focused.Some tech execs aren't starting their days anymore with a jolt of caffeine — they're betting on sleep instead."I think sleep is the new coffee," Bryan Johnson told The Wall Street Journal.Johnson, who built his fortune founding companies like payments platform Braintree and neuroscience startup Kernel, is best known these days for his antiaging regimen.