Surely now Bitcoin or Tesla shares?
As for: "...whether Brexit was good or bad...we can actually see the results..."
Not really. The UK departing from the EU has affected how the EU has behaved and now behaves. When we were a part we could counter-balance the inanities of idiots like Macron and with our departure he and Merkel et al are free to behave like idiots.
I always thought our membership was one aspect of our assistance for developing countries.