I'm new to bitcoin and have read numerous articles about it, but I still have questions about how it works.
All the articles that I read say the same that, once I spend bitcoin from paper wallet its address gets depleted. So what does that mean exactly? My understanding is that after importing my paper wallet (for example I use it for a donation) to software wallet, the bitcoins still belong to the paper wallet. I didn't transfer them into software wallet address. In other words, I let the software wallet manage my paper wallet, right?
So after I import it, I want to spend it (say I have 2 bitcoins in paper wallet). I want to sent 0.5 of 2.0 bitcoins to, for example, an address belonging to Alice. After that transaction all the paper wallet bitcoins are sent to the network to split into 0.5 and 1.5. 0.5 goes to Alice, and 1.5 goes back to where?
To my software wallet address or paper wallet address (as it was specified as outgoing address)?
If they're going back to the paper wallet, how is that that there're a lot of topics that someone lost all the change after the transaction?