Interestingly Bitcoin can’t really “fail” in the conventional sense. It won’t go bankrupt and isn’t beholden to profits. It will be an interesting experiment
I think if it plummeted to fractions of a dollar it would be considered a failure. Especially if they spent millions on something now worth a few dollars.
Of course it can. The people maintaining the network can decide it's not profitable to do so and the value could drop to near worthless.