What happened after Toni Ko sold NYX Cosmetics to L'Oréal for $400 million. And an idea that's true for most entrepreneurs I suspect (Inc.com):
The next morning, I was a little bit confused. My life for 15 years had been waking up in the morning and getting ready and going to work. But I opened my eyes that day and realized I had no place to go and no reason to wake up. I just went back to sleep. That went on for several days. Soon, I was bored out of my mind. I didn't know what to do with myself. How many days can you spend on the beach? How many times can you go shopping? My life became very redundant. It was meaningless. I felt like I didn't have an identity. I felt like I wasn't adding value to my life or to society. I just felt like a loser, almost.
Eventually, I started an investment company, and then I started to build a real estate portfolio. I was never not doing something at any given moment. But nothing was very exciting or meaningful to me. I'm a products person--I need to be in an environment where I create products. That's when I have the most joy, fulfillment, excitement--everything.
Literally three days later, I started dreaming up other businesses. Eventually, I settled on sunglasses and, within months, launched a company called Perverse. It made me feel whole again. It gave me a reason to wake up in the morning.