So you're all in / a true believer, then. Dollar/fiat going to 0?
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Does it follow that if a person is a true believer of Bitcoin, he/she has to go all in? Does it automatically follow that a person who strongly believes in Bitcoin, and even goes all in, also believes that dollar/fiat will go to zero? I think it doesn't.

Personally, I think it is natural for any currency to face eventual demise. However, it is hard to imagine fiat going to zero simply because of Bitcoin. Even without Bitcoin, fiat will still ultimately face an end.