I think you underestimate Singapore. They put a lot of effort into not being just a trading hub.
Also, what's the point in loading and unloading in Iceland, when you're already fairly close to ports like Rotterdam, Antwerp and Hamburg? I get that you could in theory ship around the pole, split your containers in Iceland and ship to the US and EU from there. It's just that unloading a container ship isn't that fast, and we're already shipping so much that the load could just be distributed across multiple ships with separate destinations.
Also, what's the point in loading and unloading in Iceland, when you're already fairly close to ports like Rotterdam, Antwerp and Hamburg? I get that you could in theory ship around the pole, split your containers in Iceland and ship to the US and EU from there. It's just that unloading a container ship isn't that fast, and we're already shipping so much that the load could just be distributed across multiple ships with separate destinations.