So I think as Steem Monsters grows in popularity that the cards will be worth more money. Their is of course no guarantee but the game is fun play. One strategy I am currently using to maximize my investment into SM is to buy cards on Steem pumps and sell cards for Steem when the price dips. For instance I bought some dragon alpha cards that I had my eye on for sometime when Steem crossed .40. If I had purchased those cards when the price of Steem was .25 it would have cost me a lot more Steem tokens.
On the flip side, I sold some reward and pack cards when Steem was .25 - .28 to get more Steem tokens per card even though the USD price was the same :))
A word to the wise, the price can keep moving in either direction and there is no guarantee's in Steem Monsters, Steem tokens or crypto in general.
Personally I have kept my investment in Steem and Steem Monsters to about what I spend in one month on eating out and entertainment.
Best Regards,
Dreamryder007