Bitcoin. Swish (Sweden) sees quite a lot of downtime. Why not settle for something that doesn't have these inherent issues that closed, proprietary systems have?
so something that is a horrible store of value, has monumental transaction fees, non-instant confirmation and is associated by laypersons mostly with speculation, fraud & illegal transactions will solve those?
Terrible store of value(worse than bitcoin)
Horrible International transaction fees(swift much worse than bitcoin)
Most money laundering and criminal activities happen in the current banking system.