Hey man. Thats a big question really.! I am still relatively new to this game but IMO the system is definitely worth investing in but I suppose it really depends on if you like to play the game regularly or not. To make any decent profit you really have to be doing your daily mission each day to earn your reward chests at least.

You can view the value of your collection here https://peakmonsters.com/@offgridlife/collection

Hopefully you will see a profit here from what you invested...?

Looks like you have a nice big collection man with some proper rare cards.... you could get more for it if you sell as a complete set..check the prices on the sets page they are crazy...

If you play the game you could be getting about 90 rewards chests a month at your level..silver ii

Peace, G.