I never really thought about it. The last years were filled with the work on my boardgame and traditional pieces I gave to charity auctions (see http://konsumo.deviantart.com/art/Changeling-Royalty-390155636or http://konsumo.deviantart.com/art/Chaotic-by-nature-471644404 ) but in the end, I don't see why not.
Well, I create a boardgame with all the pictures... A TCG would be possible with the artworks (quite easily) but I'm not really familiar on how a good TCG works. It's an interesting idea, that's for sure. For now, I'll stick to the big big boardgame I'm doing ^^