I have found a Brilliant trading route which is totaly safe.
The  route is :

1: Go to sol (system)

2: Sell all equipment except for autopilot nav computer and
   atmospheric shielding.

3: Buy enough fuel for a trip to Bernards star (near Sol)

4: Fill up remaining cargo space with luxury goods

5: Hyperspace to Bernards star

6: Go to a station (I used miller depot)

7: Sell all luxury goods

8: Buy enough fuel for a trip back to Sol.

9: Fill up remaining space on Robots or Computers

10: Hyperspace to Sol

11: Sell Robots or Computers for huge profit. (look on bulletin
    board for special buyers)

12: Repeat until very rich.