The question that whether Bitcoin and Crypto will replace dollar or fiat currency - is something worth brainstorming. What's more of an interesting question is to ask "What is money, what gives anything any value?" But a realist will probably not buy that Bitcoin will overtake Dollar soon because Dollar is the global legal tender. This question can not be answered today, it's question answer of which will emerge over time. This is a great debate. This will also give you some insight in the history of modern money and also gold. I have watched it before and am rewatching it again.