Are there any small miners left at the moment? It seems to me that they have long been pushed out by large Bitcoin mining enterprises. Isn't that so? You are a little late to talk about this. What is the point of mining for individuals now? After all, it has practically no meaning. There is no profit and there will be none.

As for supercomputers, you don't have to worry about that. Why? By the time such computing power becomes commonplace, the algorithms of blockchain technology will have changed and will become much more advanced than we can see today.

I don't have deep knowledge on the subject. But it has always been one of the subjects I've been curious about.
On the surface, I don't believe it will happen. I don't think quantum computers will exist in the near future either.
Even if they do, whether crypto will adapt.the future can provide an opposing structure and security, and I believe in it a little more.

When would it be deemed that "okay, now quantum computers are a threat to bitcoin"? How easy is it to switch to quantum resistant computing? How backwards compatible is it?

https://x.com/whale_alert/status/1849685315218256097

I was going to make a thread but it's nice to have this thread already open about this. Would it not be sensible to consider that if quantum computing reaches a state where it's usable, that it wouldn't be made public until the people who reached that state benefit themselves first?

And the argument that "there are other things that are more interesting to attackers", is no longer really true anymore. Bitcoin's market cap is higher than that of silver, cracking old bitcoin private keys is inconspicuous, and even completely legal today. If by some miraculous chance you landed on the same private key as Binance's cold wallet, that money is completely yours for the taking, as there was no intrusion, social engineering, or breaking any law of any kind to access it.

When exactly would this "switch" to quantum resistant computing happen, wouldn't it be safer to do before it's publicly known that quantum computing is now an issue? Because once that happens it's probably weeks or months too late, depending on how long it'd take to switch.

Bitcoin will win over super computers because it got time, with time Bitcoin will be able to apply better updates and with time super computers are not coming any time sooner, we've discussed this many time already and I am tired of hearing about super computers that will put Bitcoin out of Business, it is impossible.

And for the technology to be more popular in the global market, it must have to involve bitcoin and cryptocurrency Blockchain because many countries are adapting technology that have relationship with decentralized currency, because those are the kind of tools and equipment people want to association these days. For the founder of bitcoin to make bitcoins online transactions, he knew that there will be different types of technology that will come up that will encourage bitcoiners to buy those technology for mining and other things, because it will make any decentralized transaction easy for users which is what we are experiencing these days and we will continue to see different computers that will make bitcoin more popular globally.

The pace will matter ,while if any "bad" person gets a "super" computer, as in something that can crack into anything with brute force of a few hours or even days, then this is not just bad for bitcoin, think of nuclear codes, think of all the sensitive information in all secret agencies around the world, think of all state top secret briefs, these are just the political parts.

What about company secrets? We will certainly learn what KFC crust is made of lol. So all in all, I believe you are right, we need to have the defense ready when something like this happens, which is why it will improve from both sides at the same time, this way if anyone has super computer, then we would have a defense against super computer and it would not change anything for security reasons. Bitcoin will be ready for it when the time comes, there isn't any proof of risk just yet, so we do not have to worry about this yet, we can take our time and not really care about advancements just yet.

A couple good links to current state of QC's
https://www.iotworldtoday.com/quantum/quantum-computers-expected-to-be-useful-by-2026-survey
https://www.iotworldtoday.com/quantum/how-logical-qubits-power-quantum-computing-s-journey-to-stage-2

It should be pointed out that there already are several makers of quantum encryption chips that provide enough complexity and randomness to defeat decryption even when faced with QC's once they are easier available in the future. One is https://www.iotworldtoday.com/quantum/cybersecurity-company-launches-post-quantum-cryptography-on-a-chip

The race between the code crackers and the code makers is one the code makers are bound to win, it is true that quantum computers will be able to break current algorithms with ease, but quantum algorithms to encrypt information already exist and they are getting better, then it is clear that whenever we are close to getting those computers close to breaking the current cryptography in use, we can move to one of those algorithms and forget about this for good.

I don't spot a any  competition here actually, instead I see that both will be having a synergy that will boost productivity and even help them project each other because I believe the super computers will leverage on the block chain technology for some of its usability and you cannot leverage the block chain completely without having some Links around Bitcoin so it's a win win situation for both.

Every day, hackers attack all sorts of programs. This is a common occurrence, and of course, every action always creates a reaction.

Hackers create new threats, and software developers create protection against these threats. This situation is called "Battle of armor and shell".

Therefore, the creation of new quantum supercomputers does not pose a serious threat to Bitcoin.

In addition, it should be noted that the creation of quantum computers is a pre-determined event that is not a surprise to anyone (including Bitcoin developers).