Reward Card Dilema - Chain Spinner

I was lucky enough to get a GOLD chain spinner as one of my daily reward quests. This is my first ever gold card!

It took me a few moments to realise it was a gold one. I initially thought "fab - I can almost level up my (ordinary) chain spinners now as I currently have 3 of them". But when I realised it was a gold, I went to check the stats on the card.

Gold Card Chain Spinner Stats (& cards required)

This starts out on Level 3 for the first card

Normal Card Chain Spinner Stats (& cards required)

Dilema

At the time of writing, a normal Chain Spinner card on peakmonsters costs $0.268 and a gold Chain Spinner card is $8.99

If I wanted to purchase a Chain Spinner with Level 3 stats I would either need to spend $8.99 on a gold card, or 14 x $0.268 = $3.752 on normal cards and level up.

Hmm... the no brainer there is the normal cards.

The same is true for a level 4, or level 10, card. Level 4 = $17.98 (2 x gold) or $8.04 (30 x normal). Level 10 = $341.62 (38 x gold) or $107.2 (400 x normal).

So in theory, leveling up the "normal" cards to level 10 is better than leveling up the "gold" cards to level 10.

Should I sell it and buy normal cards?

If I sell my gold card for a little below market value (let's say $8.50) I could then purchase 27 normal cards (plus my 3 existing normal chain spinner cards) and level up to level 4. I would also have around $1.26 to put towards buying another card or pack.

This would mean that instead of a gold card at Level 3 (plus 3 normal level 1 cards), I would have a normal Level 4 card.

Conclusion

I wonder if this is the same for all cards, or just an anomaly for the Chain Spinner? Maybe some more research is needed at a later date...

BUT - this is my first Gold card. I don't really want to give it up. Should head or heart win on this one? I am as yet undecided. What would you do?