It is very easy to run into ruinous tax problems with privately traded companies. If you exercise options you have to pay taxes on the difference between the strike price and the current fair market value, and in exchange you've gotten something which is very difficult to sell. You can avoid ever having any tax problems by just never exercising your options until a liquidity event, but that often means letting them expire unexercised.
> If you exercise options you have to pay taxes on the difference between the strike price and the current fair market value, and in exchange you've gotten something which is very difficult to sell.
I am suggesting that you can choose to never exercise your options until there is a liquidity event and you can same-day-sell for raw income. This does require you to stay at the company until the liquidity event though.