I don’t get this argument especially here in the hackernews;

1. If they can crack the cryptocurrencies then it means that they can easily crack crypto of online banking systems as well, entire world would crash regardless of whichever asset you hold.

2. There are already quantum resistant crypto algorithms, crypto currencies can easily switch to them once it is clear that current crypto algorithms can be cracked. It would mean that people who did transactions between the detection period would probably lose their money but it wouldn’t be the end of crypto currencies.