Of course, this is one of the key points, and it will certainly also find its way into the treasuries of major countries such as the United States, China and other leading economies. When these entities start to accumulate Bitcoin and people start to spend it, it will become a unit of value ad unit of account, and we, as mere nodes, will be the custodians of its immense value: decentralisation.

That's not a stupid question.

Did you know that people traded goods with each other long before fiat existed? Livestock, shell, stone, gold, and silver all served as mediums of exchange and ways to measure value before fiat became the norm.

If the market had no fixed unit of value, markets can still determine the value of goods through supply, demand, and agreement between buyer and seller. They don't necessarily need an intermediary unit like the USD.

Bitcoin could absolutely take over fiat's role as a unit of value. But the problem is that governments are unlikely to let that happen, because they could lose much of their control over the economy, as well as their power, if Bitcoin became a widely used unit of account.

AFAIK, Laszlo bought 2 pizzas from Papa John's through an intermediary named jercos. In other words, jercos bought pizza from Papa John's and paid in USD. The pizza were then delivered to Laszlo, and he sent 10kBTC to jercos to reimburse him for the money he had spent.

At the time, Papa John's did not accept Bitcoin. So, it can be said that the 2 pizzas are still priced and paid for in USD. Bitcoin was only used in the transaction between Laszlo and jercos. I do not think this transaction can really be considered an example of Bitcoin being used as a unit of value.

I really don't think that btc will ever be fait on its own. It's very valuable,  but I think it's value will still be measure with faith. I believe it will just be regarded as asset and a very good asset at that, but being regarded as a currency of his own, I don't see that happening. I really can't imagine btc being used as means of exchange in the market, but I really can't conclude of that, because we don't know what the future holds for bitcoin. In my opinion I really don't see it happening

Today people still use bitcoin as units of account but it's mostly advanced or exposed individuals or companies. I have couple of friends who will always price most things they buy in Bitcoin and most times even get to pay in btc.

In this case we should understand that if Bitcoin will more often used as units of account, individuals will need to use it more and get more familiar with it, they moe they use it to buy stuffs, the more negotiations are made on it, then it will definetly be a normal thing.

I don’t see how that’s going to be possible, not in the nearest or far future.
So long as we are always going to have a government in place to govern and direct how a nation is being run, the monetary systems that we’ve used and known to work today would always be in place, a fiat currency would always stand out as the standard and every other currency would be valued against it.

Bitcoin can get a universal acceptance but, it wouldn’t have that unit value.

I don't see how ROI and the earning opportunities with Bitcoin have become relevant in this discussion when we are basically talking about Bitcoin becoming a unit of value. Besides, Bitcoin has become an investment asset because people made it one due to its price being volatile since it has a fixed supply and increasing or decreasing demand makes it move up and down, but we all know that Bitcoin wasn't created to become what it has become today; it was created to be used as a payment method to make decentralized peer-to-peer transactions, but unfortunately, most people don't even know it can be used that way anymore.

I also agree with @Smack That Ace about why Bitcoin would probably never become a unit of value of its own because governments won't let that happen, they won't allow an asset that they can't control to become the primary currency or exchange of value of their countries. Fiat currencies are totally under their control, they can always increase or decrease the supply, they can track every online transaction made using fiat currencies, they can keep a track of how much money people have in their accounts and how they use them, and this is all very important for governments and centralized authorities.

Bitcoin has the potential to be its own unit of value, but it encounters significant economic challenges. Most people assess Bitcoin's value in terms of national currencies like Dollars or Euros.

For Bitcoin to operate independently, the global economy would need to transition pricing everyday items, salaries and taxes directly in Bitcoin.

If I think positively, it seems to me that although I am not sure, I am saying that maybe there will come a time when the 21 million supply will spread across the world and when people start using mass and energy completely, meaning that there will be literally no value left in the $, then anyone can exchange anything else through Bitcoin if they want. Maybe now it seems imaginary but think about one thing, even 15-17 years ago when the first Bitcoin was born, people could not trust and believe in it, but now it has become the largest digital asset worldwide, whose market cap is competing with the market cap of gold, although the difference is much greater, but still it is a great achievement in this short time.

Nothing is impossible in the world anymore. However, the reality is that fiat currency and digital currency Bitcoin will coexist, but the time for BTC to stand alone without fiat has not yet come.