Haha, if you have over four million dollars' worth of stock to...

Haha, if you have over four million dollars' worth of stock to sell, it's going to take a long time to sell them all if you want to avoid paying tax, and you'll have to avoid making capital gains from other sources! Better to just deal with the tax and ride off into the sunset with your three million (or more) dollars*

*This is not financial advice. If the moderators are watching, I was only joking and they are more than welcome to avoid making capital gains from other sources and taking about half a century to sell all their stock without paying any tax, and hypothetically it is possible that the price will be stable during that half century.