Plant your own giving tree

There’s a magic tree I know of.

It grows the juiciest, most delicious apples you’ve ever tasted.

Eventually, it will grow old and die so you can chop it down for firewood

It also makes the best firewood. It smells great, but is smokeless and it burns twice as long as any other wood.

You can buy the tree with a predetermined lifespan. The trees that last the longest also produce the most fruit. 

The magic tree is a bond.

The fruit is your bond income.

The firewood is the bond principal.

The predetermined lifespan is the maturity date.

You need to grow a whole orchard of them before you retire.