The best financial decision I ever made was to sell my shares after vesting. I realised that even if I believed in the long-term business model of the company,

The best financial decision I ever made was to sell my shares after vesting. I realised that even if I believed in the long-term business model of the company, having a significant portion of my money tied up with a single stock was not a good idea. It would have still been a good idea even if those shares hadn't lost 90% of their value in the following year.