spending bitcoin how many confirmations safe

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With 6 you are from double and the like. For low-value transactions, 1 or 2 are likely enough.

The you have, the sure you can be that the guy who sent you that money can’t send it to somebody else as well (called “double .”)

Handles The Double Problem.

I am trying to determine would be reasonably to wait before accepting a transaction from an attacker that is not a miner and hence cannot rely on Finney attacks

But what if if I have a wallet with 0 BTC and I receive .5 BTC – soon before I can transfer/ that .5 BTC? This is not work.

https://en.wikipedia.org/wiki/Spending

https://en.wikipedia.org/wiki/Spending_My_Time

What is Double Spending & How Does Bitcoin Handle It?

This Man Traveled Around The World For 18 Months Spending …

Vocabulary – Bitcoin