@louispino @momomonitor @RedDogT3 If you bought 500,000 shares of  $AAPL at $0.12 in 1998 and died today, gave it to your son, and he sold it at open at same price (in the perfect non-vol world. His basis would be $178.96, not $0.12. 
Rather than paying a tax on $89,480,000, your son’s tax bill would be $0.