If Bitcoin market continues its performance then it is a good option for retirement investment.  We all know that Bitcoin has 4-year cycles, wherein each cycle Bitcoin performs a certain multiple price increases and if this cycle continue to happen then in one way or another the investment today will more likely result in a huge profit after each 4-year cycle.

Another thing is the institutional adoption and government acknowledging Bitcoin, at the current state Bitcoin is yet to be fully recognized by the majority of the country, and if Bitcoin is successful in establishing its influence and countries follow those who have a positive view on Bitcoin, we might see its value soar.

Of course, things might happen southward, after all, no one can tell what will happen in the future but for the next two cycles, I believe Bitcoin will continue its progressive performance, and venturing into Bitcoin for a retirement investment will more likely be a profitable venture.  One note though, in order to avoid a serious loss, one must invest only an amount he can afford to lose after all no one knows what will happen in the future so it is always good to have a buffer in case things don't go the way we wanted.

Bitcoin as a retirement plan is a great idea to me and I can’t see anything wrong with those that have seen it as convincing enough to make it their retirement plan. They’ve come a long way to not be useful to those that have leveraged on its use and at the same time protect and promote the ideal course of its invention.

Using it  as a retirement also require you to have faith in it and use a non-stop supply of cash for investing a very long time before your retirement. It will help you in different aspects of life after it has grown to that extent you’ll be profitable from the investment. Bitcoin has helped made things easier and profitable for us, but only those that are blessed from it will understand.

Definitely gaining popularity gradually to the masses as a retirement portfolio exposure MUST! Gradually all the big financial advisors have been flocking to the ETFs and that will be a good way to go about it for most folks who have no clue how to gain bitcoin exposure through traditional self custodial methods aka cold storage etc.

Bitcoin despite of its anticipated progress in the future, is still a risky investment. So one should always take calculated risk, and invest at your own risk. It's good to invest in bitcoin and expect for a brighter future but focusing only in bitcoin for retirement is not a brilliant idea, you need to invest in fiat as well to lessen the risk of losing your capital and to increase of chances in making significant profits.

first of all, why did you decide to call Bitcoin a bet on your topic? Are you rating it on the same scale as other known betting platforms or what?

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I haven't lost anything way more than I should ever since I got registered in here and began my crypto journey; It pays to HODL. There isn't no harm in deciding to make it your retirement plan as alot of people have done already, but what makes more sense and gives confidence even in times naysayers will be like -- we've lost it finally, but you still got it is the "knowledge"
In whatever you do, always diversify your means to other MEANS OF survival, should you ever be found in wanting.

This has been said before years ago by the early Bitcoin adopters that they'd use Bitcoin as their retirement fund. There's nothing wrong with it. Instead of putting that money in the bank and they'll earn little interest and at the same time that they're going to have some inflation. The value of that money will become lesser over the period of time. Compared to holding it in the form of BTC, you're now going to deal with deflation because Bitcoin does have a limited supply and it's last supply will be mined when we're probably dead already. That's the reason why it's a good retirement fund but for those that think it's a gamble, don't overdo it. Just invest what you think will be right for your retirement. Because think of it, the rich people are also betting their retirement funds with stocks that can be said to be uncertain in the future too.

I think a lot depends on the country you live in and retirement regulations there. If you need to save up everything yourself, it means you need to mix low-risk and high-risk investments, and I wouldn't go with relying solely on Bitcoin. But if you are in one of those welfare countries that automatically opt you in for retirement and for investment options that are considered low-risk, then you can strengthen your own future with Bitcoin and if it doesn't work out, you won't be left with nothing.
I believe in Bitcoin as a strong option for retirement savings, but wouldn't put everything on it.

In the 15 years of bitcoin's existence and development, it is not a too long or too short period of time, but it is enough to prove that bitcoin is very trustworthy and worthy of our trust in it. Therefore, we should not only be grateful to those who created bitcoin, but also grateful to those who have supported and trusted bitcoin over the past 15 years because thanks to them, bitcoin could become as popular as it is today . And for me, before learning or researching anything, I always consider the popularity factor because if it is not good, it will certainly not receive the trust of the crowd . Therefore, popularity can be a reliable measure for us to rely on when learning about bitcoin.

For those who are participating in the market and are planning to invest in bitcoin these days, what they should learn about bitcoin are the pros and cons that it can bring them, and the use cases bitcoin...from there they can decide whether to invest or not, IMO.

Bitcoin is not an "investment" but that doesn't mean that a lot of people won't treat it as one.

Bitcoin is best used as a tool for long-term savings. It will prove to be the absolute safest place to put your money for storing value decades into the future.

Some people think that the ETF is just as good as owning bitcoin but that's not the case. We all need to be careful about is the use of the new ETFs that have convinced boomers to put their retirement money into them. Since we have no way to audit these ETFs, there's no way for us to be sure that they actually have the bitcoin in reserve so it is best to just buy some bitcoin, send it to your own wallet, make sure that your seed phrase is stamped into stainless steel, and then just wait until retirement age.

Maybe the ETFs are honest and they have all of the bitcoin that they say that they have but I trust bitcoin in my wallet a lot more than bitcoin supposedly sitting in Coinbase's wallet that is supposedly owned by the ETFs which are supposedly owned by the people who buy the ETF shares. That's too much risk for my liking which is why I tell everyone that you need to own at least something on-chain otherwise you don't own anything but a paper bitcoin IOU. 

I'm a bit of an absolutist on this but self-custody is the only thing that matters.