As you all know, once you equip PC to your adventure pixpet, you can't get it back. You also can't withdraw the PC you earn, even though Adventure showers you with incredible quantities of PC so you can afford its expensive items. So can you make money off of Adventure at all? Yes, actually! It's going to be much less than the PC count inside of adventure, but that's okay! Stuff you can spend anywhere is important once you have everything you need in Adventure.

Selling to Other Players
There are some Adventure-specific items you can buy from ingame merchants that can be sent to your main inventory. These are Skill Scrolls and Potions! The player market for scrolls and potions is VERY new, so it's impossible to judge how much you can earn for potions and scrolls. Keep an eye on the Item Market and usershops alike!

Selling Eggs to the Server
Vivid Pixpet eggs consistently sell back to the server for 50PC a pop. One of the fastest ways to get them is to start a new adventure profile with a fresh pet, train a bit and grind for PC, buy low-grade egg potions, and start catching weak Vivids! Lower-level glitchpets have far higher healing success rates and all vivid eggs seem to be the same value. Server sellbacks are faster and more reliable than the player market, but it's only worth it with egg sellbacks. Still, it's a great way to get a few hundred PC into bank in a single day, which can be a really great supplement to 3 top-scoring Roodoku wins.