Comment by accurrent

While I agree cryptocurrencies don't stand a chance, my experience with qr systems has been a mixed bag. The country I live in has a fairly good qr code payment system. But there was one day when the largest bank went down and that was chaos (cash very much has a role to play). We also supposedly have linkage with India's UPI. Unfortunately, it was impossible for me to actually use that linkage thanks to the way upi works (I think only some subset of banks are supported).