I'm confused about transaction fees.
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Many places I have read that we should use a new address for every transaction, but that leads to lots of addresses with small amounts.
Wouldn't it be faster and cheaper to have fewer inbound addressees?
In short, no. The number of addresses is not important. The key factor is the number of inputs, which is generally the same as the number of incoming transactions. If you receive a total of 1 BTC over 1000 transactions (regardless of how many addresses), then sending that 1 BTC will cost much more than if you received the 1 BTC in one transaction.