Railroads were not made or built by a bubble.
Amazon did not invent remote shopping by mail. That's been around since 1800s. They weren't even the first website to do that.
and loans and interests are abstract concepts that have existed for millennia so I don't know what you're talking about there.
Bubbles and speculation don't create wealth, new tech or products. Like what aspect of bubbles are you trying wash here? They're bad for everybody except for the few rent seekers at the top.