The world of technology is evolving every year what if in future a new tech is been born that can kill crypto or works better than crypto won't this kill cryptocurrencies?
Also I heard that super computers can get through all crypto wallet keys easily in a matter of days, true or false?
I am not sure if that is right or wrong but we know that technology will always grow and evolve to better help humans in their lives. We need to adapt to the current situations to use the benefit of the technology. Related to supercomputers, I think the technology still needs development. The supercomputer will not produce massively since that will cost too high, but that can happen in the future when they have a cheap material to support that supercomputer. You do not have to feel worried about that as you only need to do what you think can benefit you.