I appreciate the vote of confidence but I wasn't trying to advise, just sharing my 2¢.

If you're seriously considering investing, but not playing I think I would consider waiting until Chaos Legion drops. Card packs that have sold out and are now only available on 3rd apartheid markets are very expensive comparatively speaking and he price will likely plummet temporarily with the influx of new and cheap cards. However, having said that, if you don’t mind sitting in them a while (a couple of years) I have no doubt you’ll profit, but I obviously can’t say anything for certain.