However this is not a significant threat as quantum computing isn't that advanced yet, there are better easier targets than bitcoins (or other cryptocurrencies), and bitcoin can always move to a quantum resistant algorithm.
At least this is comforting to know. As of the moment, I will put my trust on the people behind improving the security of bitcoin. Nothing is ever perfect, but the goal is to minimize the risks. That is why it is important to ask the difficult questions, while people are taking care to be balanced in opinion as well, so that unecessary fear is avoided. The reason why I didn't check out on quantum physics here in this forum is because I didn't think it was an issue for the blockchain until you opened it up.