I think the key to NFT collection success is:

• popularity of the theme
• scarcity
• well adjusted price (cannot be super cheap, cannot be super expensive unless it is super desired)

I wouldn't EVER but Crypto Something (be it cats, dogs, puppies, aliens, you name it) for 3 ETH.
No way. Even if I would sleep on money.
Banksy? If I were wealthy then probably yes.

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