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,
That's because you are new and also forgot to look at bitcoin's history. Going from $6k to $54k is a small rise (800%) compared to the history of bitcoin. For example the last "cycle" bitcoin went from $150 to $20000 which is 13233%, or before that price went from $2.22 to $1200 which is 53900%
I suggest you take a look at bitcoin charts.
huge profits and capitalists attracted us.
Who is "us"?
Decentralization and censorship resistance attracted me.
Overthrow the dollar hegemony? World currency? Block chain? Decentralized? , There is no substantive thing as a guarantee for this.
Bitcoin is already a global currency but it was never supposed to overthrow anything, that last part is something people thought of on themselves and you have to ask those who came up with it why they did!
Will Bitcoin eventually crash?
It depends on how you define "crash".
Going down 30% could be defined as a crash in any market. Bitcoin has regular drops of that size. So yes bitcoin regularly crashes.
Going down 10% could also be defined as a crash in many markets. Bitcoin has them even more than 30% drops.
Going down 80% could also be defined as a crash. It is rare in bitcoin and it only happens if bitcoin reaches a massive bubble like if it reached $500k.