Bitcoin's rapid price development from 2020 to 2021 makes people feel a little crazy. From 6000 US dollars to the current 54000 US dollars, huge profits and capitalists attracted us.
People also feel crazy during the 2017's bull run. The current rise maybe attributed to a lot of factors, including institutional money.
Overthrow the dollar hegemony? World currency? Block chain? Decentralized? , There is no substantive thing as a guarantee for this. To be honest, I also have investment, but only for profit.
Of course, there is no guarantee, as I have said, after 2017's bull run, the market crashes, went into a long bearish trend. But I don't think that bitcoin will overthrow fiat though, and it won't become a world currency.