There was no window of opportunity, and if it was it would have been almost a decade ago, Swish was launched in 2012, by that time the number of people using bitcoin was in the thousands at best, i-zettle The Pharmacist mentioned in 2011...
No, bitcoin and other cryptos never had the opportunity to grab a piece of the pie, mobile app payments took the bulk of payments in Sweden well before people become aware of what cryptos are.
You have to understand one thing, people care about their time a lot and they hate trying things that can't be done with 2 taps.
At the same time, they hate when dealing with money not to have someone to complain about, not to be able to blame mistakes on somebody, not to be able to issue chargebacks and a lot of other things.
That's why payments with cryptos are still stagnating and more and more embrace the safekeeping side of them.
To be able to compete with the new systems and even with cc, crypto payments need to be fast, easy and cheap.
And unfortunately, unless you go through a 3rd party they are not, and once you go through a 3rd party the costs of that operation come into the story and ... we're back to where we left with the only change that we're not calling them banks but crypto something...
As much as I would love to see usage growing I'm pretty pessimistic about it for the next couple of years at least.
Two pages will do me fine as long as a decent conversation emerges
For those that are driving forces behind pushing their crypto to the front line they should keep the Sweden scenario in mind so when it seems another country might go to those lengths trying to become a chasless society - maybe they will be able to make early in-roads with a view to expanding crypto usage in the process.