Hmm.... I won't advice you selling the DSLR camera but I never knew when you sold it.I love that Camera for it great image sharpness and graphics But since the deed is done, I don't want you to feel sad about it. Remember happiness is a choice and I want you to always be happy @arunava.
If you think Gopro is okay for you, no problem about that. Just go for what you love because It wall always make you happy whenever you are seeing it.
I don't want you to be confused and disturbed about it, Just stay focus, relaxed and go for a good decision you won't end up regretting.