I doubt that. It's is very impossible that dollar will be replaced because Bitcoin is only present if there is an Internet Connection. It was like years ago when the plastic money ( credit cards/ debit cards ) came out. They said that these will replace dollar however, it didn't because still there are more people who uses dollar rather than alternate form of currency and dollar is used by the masses.
Yes. The Dollar has the trust from many people worldwide as a reserve currency. It'll be hard for Bitcoin or any other cryptocurrency to replace the Dollar, as cryptocurrencies are not regulated or backed by the government. As such, both fiat and crypto will emerge as a separate asset class for years to come. It'll work the same way as with credit cards and fiat currencies where they exist alongside each other.
However, while Bitcoin may not replace the Dollar, it could replace existing payments systems such as credit cards, and even money transfer services such as Western Union or MoneyGram. In the future, the dollar will become a digital currency that will be used the same way as it is right now, and will live alongside decentralized cryptocurrencies for many generations. So, instead of Bitcoin replacing the Dollar, what it will do is improve it for the better. Just my thoughts
