A Bitcoin user faced a serious mishap by accidentally paying over $60,000 in transaction fees due to a misunderstanding of fee units during a replace-by-fee (RBF) transaction. The user intended to send 0.48 BTC but mistakenly set the fee to 305,000 satoshis per byte instead of a modest 30.5 sat/vB. This error arose from confusing the fee structure in their wallet. As a result, a large amount of Bitcoin was sent as a miner's fee. RBF allows users to resend a stuck transaction with a higher fee, but errors in setting the correct inputs or outputs can lead to significant financial losses. It is crucial that Bitcoin users familiarize themselves with fee units, double-check their transaction details, and utilize trusted wallets that offer guidance on fees. The incident emphasizes the importance of proper fee management in the Bitcoin network and serves as a cautionary tale for crypto users.

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