Porter bought these expensive comics not only for his own collection. He only wanted one of them for himself. Most of them would be used to create gimmicks and sold when the right offer came along.
These comics, therefore, were an investment.
Li Du gasped in amazement when he found out about Porter's future plan. America was truly worthy of being the center of global economy and finance. Anything here could be marketed and used to make money.
Porter now had a different opinion about Li Du and Hans. He accepted them as true friends because they had helped him.
Therefore, when he found out that they did not understand the investment in the comics industry, he simply explained it to them.
Investing in comics to make money could be very complicated. After all, to balance the return on investment, the value of the comics collection had to be high.