If he won't die, it would be good, of course, but , on the other hand, if he'll die, it would be such a great end too. I just don't think that if hero die in the end honorably, it's bad. In my opinion, the ends like that are nice in their own way.
Inb4 this is actually a Jojo series and Tanjiro gets taken over by Muzan while Nezuko's descendants fight the doctor who made Muzan a demon while later going to Egypt to battle Muzanjiro.
NOOO TANJIRO!!!!
Urgh I really hope Tanjiro is simply holding a wisp of breath left in him to stay alive, and Nezuko will reveal that he's alive, but at the same time I don't want to get my hopes up.