In the SL world, everything works on Linden$ (L$). Everything you build costs money. For instance, if I want to build a cube (or other type of primitive) it costs me $10. If I destroy that cube, I get my $10 back. If I decide to keep the cube in the game at all times, even when I’m not logged in, I get taxed on it. This is to encourage people not to leave stuff just lying around, cluttering up the landscape, and more importantly, the game server with processing your junk.
Every week you get a stipend, of roughly L$1000, which will never increase your account balance beyond $3500. To gain more money than that, you have to earn it. One way of earning L$ is to sell things, such as clothes, models, or scripts.
Unless you figure out an exploit, you cannot steal anyone’s things. Every note, script and object you create has a list of permissions, such as copyable, modifiable, moveable, buyable.
In most of the SL world, you cannot hurt anyone. In the areas where you can be hurt, if you die, all that happens is you get teleported home. That’s it.
You don’t have to worry about someone beating you up and robbing you 🙂
My favorite thing about SL is the scripting language. Like Hiro in snow crash. You can literally click an object in the game, and bring up the scripting code in a window, and start futzing with it. This is a really good toy version of the metaverse 🙂