There's always the option to mine in Open. But log out just before jumping into the heavily trafficked/blockaded pirate/PvP grief sell system. Log back in under Solo/PG and enter said selling system. Bank your millions in profit.
Problem solved.
ps: If you're a PvE minded gamer, then there is ZERO rationale or reason to bother with entering Open. Because PG (especially PG groups like Mobeius with some registered 40K+ members) is IDENTICAL to Open.
The only difference is if you in you mining ship encounter me (as a non mining/combat build Cmndr) then NOTHING happens. The worst you can ever expect from encountering a PvE Cmndr like myself is an annoying/friendly Hello Cmndr 07 07! on your Comm
Finally, PG is superior to Solo because you have the assistance and support services of the likes of the Fuel Rats and SAR (besides other Cmndrs with whom you can collaborate/wing up with). These fearless and diligent First Respondere Cmndrs make a career of putting thier lives on the line playing in Open. So tbh, there really isn't a need for PvE minded Cmndrs to play in Open. Unless they desire a persistent Permadeath experience from 99% of PvP encounters. Other than that, your game experience is the same (if not enhanced/better from a PvE perspective) if you play in PG.