I collect video games because it is something I obviously really, really enjoy, but it isn't something I have to do or depend on. If misfortune struck me to the point where I needed to sell off most of my collection it would obviously be very upsetting, but what matters in the end is that you have games you like to play in your possession, whether that's digital or physical. I've found that most "good" games are typically average to slightly above average in quality. A few are very good, surely above average, and then there are very, very few that are exceptionally good. So when you break down anyone's collection, hell, even my own, I own probably 75% average games, 23% pretty good games, and 2% excellent games. And I don't typically buy games that I know suck. I imagine that most other people's collections would have a similar breakdown, especially if they collect to play. Breaking all that down, 2% of my collection is about 40-games, and if that's all I could have that would be okay.
I try to keep things in perspective whether its collecting or anything in life. There will always be someone else who is better looking than you, richer than you, smarter than you, or has a bigger collection than you, but what really matters is how you feel about yourself. I'm happy with my collection, very happy with it, and I'd be happy with it even if it shrunk significantly. Surround yourself with things you enjoy and things that make you happy, and don't let what others have make you feel bad about it.