Btc prices and altcoins will alway fluctuate. What I have seen often than not is the steemmonsters cards rise in value in the long run. Just getting a gold foil at a higher rarity will likely be worth more tomorrow than today.
just remember what your trying to achieve with the btc. Having it sit and wait for it to rise in price or be holding steemmonster cards that you can use to earn crypto or trade it for crypto. It was a phenomenal idea when aggroed paired the cards value in terms of dollars in lieu of a specific crypto. This gives sellers opportunity to receive either steem, sbd, or dec. I can see the future of the card prices be higher as clear as day. I only been watching the resale market for the past month but generally any gold foil had been rising in value. The price increases in my opinion will offset the lower btc for steem I think in the long run. I don't have numbers to prove it so you have to see it yourself.
Just wish I started paying more attention to the game even a year ago because card prices still weren't as high as now. It seems to only go up as more players jump in board.