I'am really had difficulties to answer & explain:

how does a bitcoin have an economic value, so there is people willing to trade US$ (or any other traditional currency) into this virtual number?

what is the creator do at the first time to give it an economic value?

I am really having difficulty answering this:

Why does a bitcoin have an economic value, such that there are people willing to trade US$ (or any other traditional currency) for these virtual numbers?

What did the creator of Bitcoin do at the start to give it economic value?