In Dominion you aren’t restricted to just making money from mining and trading, you’ll be able to do a whole lot more.
If you find an abandoned station or the hulk of a derelict vessel, you’ll be able to break them up and take the metals and materials that they’re constructed of, then sell them on to the highest bidder. Sometimes you might find a high price for rare finds which collectors have an interest in.
But take care... sometimes these wrecks aren't what they seem...