Yeah, it's true. If only we have a quantum computer laying around that capable to be used to hack those cryptocurrencies lol. Anyway you can read this article too just so you can have another point of view for this matter

I just type "do quantum computers a threat to bitcoin" and there like About 854,000 results show up. So this just like @avikz says, it's an old debate and we should not repeat it over and over again. We never know what quantum computer capable of cause we don't have one. it's not like a regular computer you can buy of the store right?

But you not really care about all that don't you? Cause you just want to gain more traffic to your website and gain that sweet ad revenue, can't even look at the article without turn my adblock of.

Not because someone stupid tells you means it is truthful
If that article is true.then maybe all of our cryptos are gone by now?are you using commonsense?or you are just believing in hearsay?
Even CIA can’t hack crypto just like that so better find some truthful storys than this old debate

Jeebus. If we already have stable and reliable quantum computer that could constantly attack and potentially crack bitcoin, then mate, we have far bigger problems than bitcoin being "hacked".

I have no ideas how quantum computer will be able to hack any cryptos in a matter of seconds only. If this will be truth then there will be no more people using the internet and computer for something that related to money including e-commerce but I believe if it will be true then there will be someone or group of people who create something to fight against this possibility.

None have been hacked yet. The weak point has always been the exchanges, or people being phished.

If its possible the banks that can spend billions to create quantum computers would probably spend billions to crack all these cryptocurrencies. Unfortunately they might not be able to successful do it. Blockchain is almost impossible to hack. There are literally millions of wallet running which everyone had downloaded the blockchain on their computer. Do they mean to hack each?

The answer to the question is not really obvious. Firstly, as stated in this article,
The progress might seem fast for now, just like people in the late 60x were pretty sure about us traveling casually to nearby planets from time to time at the beginning of the 21st century, and yet here we are, still as far away from the goal as ever. There might be something similar awaiting in the future of quantum computers. Moreover, as the article also rightfully mentions, some cryptos are already quantum resistant while others have some interesting methods of preventing being cracked (using addresses only once).

Actually, there are currently quantum computers that are available for military and academic purposes, now that I think about it. They are pretty expensive, however, and the amount of time you can spend on a quantum computer, in seconds, has a price which is measured in dollars. It's impressive that they have some semi-working models right now, but as you say, they're a long ways away from being an effective means of breaking the cryptography used in cryptocurrencies. It's good news for us, since we don't have to be worried about crypto being broken anytime soon. Ideally, anyway. I think there are less than a dozen quantum processors that currently exist, and at least one of them is very prototypical (which was a google processor from a few years back). Anything for common use should be at least a decade away.

Same time you cannot assure with this statement. Hack is same as a learning to evade cracking the ways. I believe everything is hackable, however a small error can make a big change. One such took place recently when a large sum of ethereum funds got frozen. It wasn't able to read, but later a small boy released the entire funds with his knowledge into reverse engineering.