Nothing lasts forever; even bitcoin to me won't last forever, but it's definitely going to take almost forever. At least this generation might not be able to witness that if it's ever going to happen.
 
I don't see regulation as a big threat to bitcoin anymore. Gone are those days when bitcoin was banned in a particular country, and that will have a great impact on the market. Now that people have adopted that and planned for the worst from their governments, they will only attack big firms, but adoption will still continue secretly by those interested in it. 
 
On the side of competitors, for the most part, I haven't seen anyone, but if there ever has to be one, then it will hold its place, while bitcoin also holds its place.
 
These days, it's hard to see a crypto project that's completely decentralised to start with, so how can they compete with Bitcoin? Greed, censorship, and centralization won't allow developers to get something close to Bitcoin.

Bitcoin's future is uncertain, and its longevity definitely depends on various factors.

Off course, nothing lasts forever, but it has improved incontinence through updates and development. Secondly, it's longevity also depends on how adept it is at those factors and keeps on meeting the needs of the users.

Another is the society defined now by the internet, to which everyone is wagering to belong; the Bitcoin market is becoming wide and certainly will still be there for years to come. 

Future? It's already in the present and yet Bitcoin continue to exists with all the regulations from countries to countries and financial watchdog like AML.


Common, what altcoins do you think will challenge Bitcoin? I'm sure you don't know about the so called Flippening (ETH) and Rippening (Ripple) before. Those where school of thoughts that during 2017-2018 era who says that either of the two will dethrone Bitcoin but it didn't happenned.


Not worth it, will cost millions upon millions for a entity to do this. So I don't think that they will attempt this. Perhaps before it can be done, but with todays' so many players in the mining industry, they will not even think of it.


Give us example of what events that you see that people will lose their trust or confidence on Bitcoin.

I mostly agree with you. You have shown both sides of Bitcoin future including what helps it last and what could hurt it. Bitcoin independence continued popularity and strong network are crucial for its survival. However outside factors like new laws competition from other cryptocurrencies security risks and losing public interest could harm its chances. But the term of 'forever' is doubtful. Because everything can't exist forever.

Just as the saying goes that " nothing last forever" if human being does not Last forever i don't think bitcoin will last forever neither but I believe it will stay for several decades. In as much as we preach about bitcoin everyday doesn't mean that there is a guarantee of not undergoing changes. What I believe about bitcoin is that it will last for a long period of time, but it doesn't mean It will last forever because no one even know how long it can last. The world is full of Changes meaning that a new thing greater than bitcoin may come up and distract the minds of people. because most people are already Groumblings about  the price of bitcoin, saying it's too expensive to afford so they need  an investment that will help grow gradually and make them rich just like bitcoin. And if anything slight difference from bitcoin should exist I think bitcoin will reduce the value because people will pull out their fund, that is the only thing that will reduce the value of bitcoin.

Not just that, it is said that Bitcoin could be mine in the next 100 years, 2140 as others said, so we can't really wait that long for Bitcoin and so we are all dead by that time. And if there will be a take-over, whether it's ETH or others, it could have happen before.

But not in the next coming years, Bitcoin is to big to fall, it has established it's dominance almost 45%-50% so it's very difficult for any coin to suddenly go up in billions in terms of market capitalization and overtake Bitcoin at the top position. Regardless of what the argument of the OP, it's obviously flawed, in my opinion.

If you replace the word Bitcoin with most anything else, what you said can be said about them as well.
For example "Dollar will continue to exist as long as people accept it"...

1. That does not threaten existence of Bitcoin as a decentralized network. It can only threaten the growth and its price. Such a ban is also local not global and Bitcoin is a global system.

2. That also doesn't threaten Bitcoin's existence. Regardless of the fact that there hasn't been any kind of competition in the past 15 years for Bitcoin as a decentralized payment system, even if there were it still be an "alternative" not a replacement to be a threat.

3. That's the only viable threat that has been addressed by reviewing the code and the fact that the cryptography used is  solid algorithms and with decentralization that has made attacks practically impossible.

4. Again that can be said about anything! If you want to make an argument you have to do much better than vague statements like this. For example explain why would people lose interest or confidence so we can discuss that reason not the result.

1. No one knows how long the original bitcoin is here for. Original because we have bitcoin ETFs and other variants may come up later. But from all indications as long as we continue to hold bitcoin and find other use cases for it, it is going to remain.

2. Of course, when compared to other cryptocurrencies that are centralized bitcoin's decentralized network is resistant to any coordinated attack that thinks it can succeed in shutting it down.

3. Because of its open source nature, any technical or security flaws are identified and resolved way before it becomes a major issue.

The best thing since sliced bread, Bitcoin is the future of currency. But it takes toughness and strength to stay at the top. That means no funny business, no security breaches, no 51% attacks.

I understand that public opinion and rules worry certain people. You know what? They raise valid issues. Those are issues we cannot overlook. But I'll tell you something: obstacles are really chances disguised. The government has to hear from us and be shown why Bitcoin is the greatest and beneficial to all. We have to create trust and educate the people.

And things are continually changing in technology. We shall work things out and find answers to these issues. Bitcoin is going to become much stronger and even better. These are the times, people. Do you not want to be a part of something significant?

We cannot be 100% sure if BTC will last for ever as we are just mere humans who in no time will have to face nature's call. BTC is a technical advancement which was designed to be used by humans and so long the world, technology, the Internet continues to exist(if man doesn't ruin the world by themselves) it will still be there carrying out it's core function as a means of transaction.
[¹]Even though there are countries where BTC is banned it actually doesn't stop anyone from using it. It's a decentralized system and the government cannot control who use or not use BTC so long you keep your identity hidden.
[²] for years now, there have been so many crypto currency forked out of BTC. They try to be like BTC, some even use it's code but they have not been able to create anything close to BTC. To be frank, I really dont see any cryptocurrency getting even close to BTC in the next 50 years. Though I'm not saying it's not possible.