[api]

If he only cared about his wallet he would have gone into finance, not tried to build an aerospace company and do other absurdly hard things. Finance is where all the cushy easy money is.

He is definitely egotistical but he obviously has more complex motives.

[kaba0]

Like enjoying playing with stocks?

And frankly, he would not be the richest person on Earth if finance was where the sweet old money is.