GGG are very good at picking up on the bot. So while you are sleeping, if it gets stuck or it is farming repeatedly without breaks or any host of things an unattended bot might do, there is a very real chance you will get hit. And when you do, your IP will be monitored (unless you were on a VPN) so kiss any chance of botting on your IP again goodbye.
Is it safe? As long as you aren't being reckless and derping should be fine. For what you want though, I wouldn't risk it especially at the moment when the bot is fresh after 2.0 and core changes to the bot have been made.
If you want to keep an eye on it and monitor it every once in a while, it'd be fine.
TLDR: I wouldn't leave it unmonitored for any extended period of time unless you know what you are doing. Besides that, as long as you don't do anything stupid it's fine.