For Bill Harris, there are two inevitabilities in life: start-ups and taxes. In 1993, he joined tax preparer Intuit INTU+1.36% as executive vice president and became CEO in 1998. He soon departed to become the CEO of what would become PayPal PYPL-1.52%, where he worked briefly alongside Elon Musk, Peter Thiel, and Max Levchin. Since then, Harris has been neck-deep in the start-up world, helping to launch numerous fintech and cybersecurity firms, including Personal Capital, a registered investment advisor th ...