NFTs are digital assets that use the technology behind cryptocurrencies to create unique tokens, each with its own identification that isn't replicable. These tokens serve as a digital deed for original editions of online art, music, and memes.

NFTs -- short for nonfungible tokens -- are acquired by bidding online, then paying in U.S. dollars or cryptocurrency. These tokens have taken off in popularity in recent weeks following the sale of digital art for millions, and celebrities and business leaders jumping in.

The major risk of buying any cryptocurrency, including NFTs, is that value is largely based on speculation. Buyers are hoping their NFTs will be the future of collecting without guarantee.

If you're thinking about purchasing an NFT, here are a few key things to know.

An NFT can be music, art, trading cards and even tweets.

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