If you ever needed a valuable lesson to why you shouldn't ignore emails, just speak to Silicon Valley venture capitalist Chris Sacca.
The SharkTank host has a brilliant track record of early investments, with shares in tech companies like Instagram, Kickstarter, Twitter and Uber.
However, when Sacca was approached by Snap executives in 2012, he ignored the email as he no interest in Snapchat as a platform.
But with news of Snap CTO Bobby Murphy and CEO Evan Spiegel both reaping A$360 million payouts when the company went public this week, Sacca shared his regrets online.