A fake 1938 Superman comic book has very little to no value. It's not the real thing, so it doesn't hold any significant worth for collectors or enthusiasts.
In some fanfictions, it could be because Peter has a pure heart. Just like in the MCU, only those worthy can lift Mjolnir. Peter might have proven his selflessness and heroism in a particular situation, which made him worthy enough to lift Thor's hammer.
The reason why there was so much smoke in the Monster Superman Cafe was probably because there were people smoking in the cafe or because there were people smoking in the cafe. In addition, some cafes would provide smoking areas to allow smoking indoors. If you don't like smoking in the cafe, you can remind the waiter or manager or choose to eat in another cafe.
Yes, it depends on the type and capacity of the crane. Some large construction cranes are designed to lift heavy weights to great heights and could potentially lift 700lbs up to 11 stories.
Well, some notable characters who can lift Mjolnir in comics include Thor himself, of course. Also, Captain America has been shown to be worthy and able to lift it on occasion.
In the comics, Vision is not able to lift Mjolnir. This is because the criteria for being worthy of lifting Mjolnir are specific and Vision doesn't meet them. It's more about a combination of moral, heroic, and noble qualities that he may lack in this context.
The dumbbell weights in the manga fluctuate. It could be as light as a few kilograms for novice characters or go up to tens of kilograms for seasoned ones, all depending on the story's context.