Bitcoin will more then likely won't destroy fiat , Banks and goverments will simply won't let us do that . They will even make their own crypto currencies but It won't be decentralized like Bitcoin because they like to control .
Now if we speak about the price , yes It's going to rise a lot and if we speak about the users then yes It will rise a lot too but "Almost everyone" ? probably not .
Yeah, right now governments are making a lot of negative advertisements about bitcoin as a scam.
Earlier I have seen it in the news they were all talking about bitcoin as a scam and I am like "WTF are they saying". This is what happened when there are many people into bitcoin rather in their banks.