Bitcoin is a very good thing to have as an asset. Just like gold. Even better if I may say. It's secure, and unlike fiat money it actually exists and work is put into it to produce it. This makes it great to store value.
However, it cannot and will not replace current fiat money that the entire world it using. It just cannot.
alright, the point is both bitcoin and fiat is not really secure. they have their own good side and bad side. however I agree with your statement. bitcoin will not change fiat totally, but in some cases we can buy stuff by bitcoin.
Every day a lot of people gets their fiat robbed but you can't blame the government for that (or whoever made fiat). You can't say that paper money isn't secure because you got robbed.
