Drawing the line on coin loss?

So I bought Hero Messi a few days ago at 1.410m, and now he is down to 1.350. Curious to see where other people draw the line, honestly I thought he wouldn't be a bad pick up because he is a special Messi card, but of course he has dropped 60k already.

Where do you draw the line before you just cut your losses? (worst part is I could have had nif ronaldo and nif messi at the time I bought him)