According to the source, a BTC transaction reportedly included over $105,000 in miner fees to send roughly $10, highlighting the risk of manual fee settings during network congestion, source: user-provided tweet. Similar outlier incidents have occurred; Paxos confirmed it mistakenly paid a 19.821 BTC fee in September 2023 and mining pool F2Pool later returned the funds, source: Paxos official X statement; F2Pool official X statement. For trading decisions, monitor mempool congestion, sat/vB fee bands, and unconfirmed transaction counts to anticipate settlement latency and near-term BTC volatility, source: Bitcoin Core fee estimation documentation; mempool.space fee charts. Elevated L1 fees can redirect activity to centralized exchanges and Lightning, affecting deposit/withdrawal times and spreads; track exchange status pages and Lightning capacity to manage execution risk, source: major exchanges’ public status dashboards; Bitcoin Visuals Lightning Network capacity data.