I am not a german teenager, are you a fucking AI? Because you are sounding just like AI following a script of bad training.
"cannot isolate a national economy", "never purely national", no shit Sherlock. But we are discussing insignificant parts of a nation wealth. Rubber in 1880 Germany was like 0.2% on GDP if I am being generous. Deutsche Bank is a national bank. By 1880 Germany with no colonial empire was a capital exporter, not importer. Sweden and Spain, your typical african colonies.
Why are we discussing this shit?