Even if he were to stop earning a single cent from now on and waste all his money, it would still take several lifetimes to exhaust his wealth.
Besides, he knows that he will be even wealthier in the future.
He has been the world's wealthiest person more than once, but Mr. Clark doesn't find that particularly interesting.
Although he has always been frugal, it doesn't mean he is obsessed with money.
In the past, he loved money because he was poor, and without working hard to earn it, he wouldn't have enough to spend, resulting in a tiring life.
However, when money becomes just a figure, he loses interest in it.
After all, even with all the money in the world, he still can't buy the future of human civilization from the Compound-Eyed Observer.
His business endeavors and growing wealth are not for fulfilling personal extravagant desires or, like other prominent businessmen, to pursue self-achievement and a sense of social responsibility.
