Where should I spend my stubs?

[RICH_chocolate52]

I'm sitting on 500K in stubs and not really sure where to spend them. I don't play online that much but enjoy the collecting of cards. So far I have finished Mantle but am still a good distance away from Trout. Should I invest into TA exchanges or buy other cards that I am short on for Trout?

[SaveFarris_PSN]

Trout isn't that unobtainable. You're probably closer than you think.