There are different ways in which 'never selling Bitcoin' can be understood. If it's never selling in a figurative sense (meaning that at some point you do sell, when the price is right), that's fine. If it's 'never selling' but not 'never using' (meaning, you don't sell, but you can spend it directly to obtain something great), it makes sense. But if it's literally just keeping BTC indefinitely, without ever using it, that's not benefiting anyone. Such BTC is sort of dead for the system (because it's de facto not a part of circulating supply), and it's just numbers on a screen to an owner who never uses it to gain something.