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> With unusual characteristics (especially the use of outputs from transactions being used as inputs to new transactions without much confirmation depth on the chain)

I'd love to hear more thoughts on this. I'm new to crypto but what are your thoughts on the reasoning here, fraud?

Also, what would explain the creation of so many yellows?

I'm just guessing:

Yellows mean you don't care about privacy (a big company doing legitimate business may not care), or have accepted that blockchain analysis will defeat your privacy efforts anyway (https://en.bitcoin.it/wiki/Privacy), or you're a novice bitcoin user who doesn't understand what is safe and what is not

High frequency speculative trading could explain the pre-confirmation transactions. Maybe the probability of double-spending is so low, and the chain consensus is so strong, that a transaction in the mempool (before being locked into a block) is good with high probability. Or it could be novices who don't understand the danger

Definitely the Bitcoin network looks unusually "hot" today

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