Nobody can give you an accurate answer about this. But you can still use bitcoin to pay on some websites. Also you can decide to settle some deals with someone that you know that knows about bitcoin with bitcoin. Bitcoin is frequently used for purchases and payinfor services in some countries. Some countries are very bitcoin friendly.

That is what that was said but those that designed bitcoin design it to be an investment.

Bitcoin is a viable payment option but the fee is getting high without going down as usual as it was before. Lightning network is one of the ways bitcoin payment can be better.

I will say that also.

Bitcoin is widely accepted currently but partially as a means  of payment.
Bitcoin  initial creation was to provide a sole purpose of a decentralized  form of digital currency  I.e free from any form influence from government or agencies unlike the fiat system  which is centralised  and controlled by the government and its  agencies.
Bitcoin  has been made a means of payment in some countries and I  know sooner than later more countries  will join the course.

Some would argue it already is widely accepted as a payment option. It is used in multiple countries both online and offline and is the legal tender of at least 1 country at this time. In the short time it has existed, that's a lot of progress.
If you're asking when it would compete with VISA, PayPal and other payment options, no one can say for sure when that will happen.

Yes.

The Bitcoin whitepaper starts off describing Bitcoin as;
"A purely peer-to-peer version of electronic cash [which] would allow online payments to be sent directly from one party to another without going through a financial institution".

• Scalability is the most important factor a viable payment option should have. Second on the list will be price volatility.
• Yes, bitcoins are speculated on more than they are used for payments.

You need to move to El Salvador to know if Bitcoin was been accepted as legal tender in there.

If you're wishing Bitcoin to be used as payment option in other countries, the most important thing the government need to declare it's fine to use Bitcoin as currency even though they didn't explicitly legalizing Bitcoin as legal tender.

Second is, the developer need to find a way to send Bitcoin for free (using L2 or sidechain make you need to spend for few cents, people are looking for free).

but why for free? card or cash processing is included into price

You have asked a question that no one has an answer to.  The number of people around the world who know about Bitcoin or cryptocurrency is much less than the population of the entire world.  I saw a survey that around 10% of people know about cryptocurrency. But its increasing rate is very high.  However, it is expected to spread worldwide in the next 10-20 years.
Moreover, Bitcoin is accepted as payment in many areas worldwide. If you wanna use any service for Bitcoin then you can visit this map- https://map.bitcoin.com/

You can't always get the most accurate answer for this sadly, but I can drop my own point of view, Bitcoin has three features that can help people depending on what they want.

1. Bitcoin can double or triple your money if you invest when its cheap and sell when it's high in price, you can make Bitcoin your investment haven.

2. If decentralization is what you care about, Bitcoin is here to serve you right.

3. You looking for a good store of value? Bitcoin seem right as a true digital gold.

4. It can be use as a means of payment, its just left for both sides to accept and receive as a means of payment.

So what's left now is what you want from Bitcoin, if none of these isn't what you are looking for then start looking into something else, whichever way people sees Bitcoin is left for them, as for me, it's a good investment choice, store of value and also fits my decentralization needs.

I have to agree with this. People nowadays seem to be more greedy as it is. Bitcoin is a highly profitable digital asset or investment, and grows its value along with time, that’s why a lot of us prefer to buy and hold it for long term than to serve its purpose as a mode of payment. Now, even if you are living in a country where bitcoin is accepted as a payment option, I don’t think you’ll be more willing to pay using bitcoin more than fiat. No one would waste spending its hard-earned bitcoin when we all know majority are greedy to have it. Besides, bitcoin has the highest ROI among other investments, which attracted a lot of people to save bitcoin for investment rather than having it as a currency for payment.

Bitcoin's original design was to be a peer-to-peer electronic cash system. The landscape has changed substantially. Bitcoin is primarily seen as an investment because to its volatility and capital gains. Apathy against its use for daily transactions stems from this investment-centric viewpoint. The hefty fees and empathy for people who've dealt with them explain why Bitcoin hasnt become a popular payment option. Transaction prices are "insane," especially for modest purchases, and a major obstacle. The issue is consumer perception and economic viability, not merely technology. Bitcoin has been tested as a payment system, but its high fees and investment status prevent its acceptance in regular business. To fulfill its full potential, a paradigm shift is needed to overcome its psychological and economic challenges.

Before it becomes widely used for payments it has to be widely owned as an investment/store of value/savings. We are still very far from the first condition. Probably less than 1% of the world owns Bitcoin. Even if you take out the children in the population, adoption still is probably only right around 1.0%. 1% of the adult population, spread all over the world. That's not nearly enough density of ownership for merchant adoption, which is of course required for people to make payments.




Specifically, what we need to have Bitcoin being used regularly for payments is:

1. Cheap fast transactions (Lightning Network ✅ and other solutions like that)

2. As said above, enough people owning bitcoin - still many years away from this

3. To add to #2, enough people owning bitcoin for a long enough period of time, cuz people are only going to want to spend their bitcoin once they are easily in the green and not worried about spending at a loss. Because a lot of the whole point of Bitcoin is to use it as savings to gain money while you are holding, so at least in more economically stable countries, people will only bother spending bitcoin they've been saving for years and have seen plenty of value appreciation on, though les economically stable countries people may not care so much because they would just be trying to get out of their weak currency/corrupt banks. So let's say that delays the payment use case for one to two market cycles, so 4-8 years delay beyond when there is enough ownership density in populations to warrant merchant adoption

4. Less volatility and appreciation. People aren't gonna want to spend bitcoin all that much if it goes up a ton in value over time. Though this may not matter because by the time there are enough people to satisfy #2 and #3 bitcoin will probably be fairly mature and will no longer be going up by dozens percent per year.

5. Merchant adoption. Can't buy things until merchants add bitcoin payment options. And there is no reason to do this until #2 is hit. And of course this will happen gradually over many years, and then actual use of these bitcoin payment options by the public will gradually happen over many years once it is available.

6. Tax laws that make room for bitcoin payments. Not very many people are ever going to use bitcoin for payments if you have to calculate how much capital gains tax you owe every time you buy something. So in nations where you pay taxes on bitcoin profits (most nations) there need to be laws that allow transactions under a certain amount to be tax free. In the US Congress such a low has already been proposed a couple times (tax free for txs with less than I think $200 profit), but we are still probably numerous years away from the law actually getting passed because politicians don't know enough or care enough about Bitcoin to bother passing such a law yet.




So yes, bitcoin was designed as a p2p payments platform of course, in addition to being designed as a perfectly transparent scarce hard currency, and it is completely capable of being used globally for payments with second layer solutions, since the base chain was not designed for large payment usage obviously. But the six things above will have to be met before we see people regularly using bitcoin for payments. I'd guess we will see payment adoption take off in the 2040s and 2050s. 2020s and 2030s its still going to primarily just be used for investment/store-of-value/savings.