Your question is what might happen when no more bitcoins are produced in 2140 (and not 2041). The discussion starts here: https://youtu.be/kYtwxtCPIik?t=1493 (at 24:53).

There are many possible scenarios -- too many to make any kind of prediction. Any honest prediction should be preceded with "Nobody knows, but ...", and followed by one of many speculations on what could happen. The scenarios presented in the video are all very good.