It's clear from their customer support reps' reply that they are quite new to Bitcoin and how it works. Anastasija tells you that, on average, it takes one hour for a bitcoin transaction to be confirmed. That's not correct. She probably thought of transaction finality. Many sources have claimed throughout the years that a bitcoin transaction requires 6 confirmations to be considered final and irreversible. Assuming that, on average, a new block is found every 10 minutes, a bitcoin transaction will reach finality in one hour, but the first confirmation, on average comes after 10 minutes assuming that high-enough fees were spent.
Literally how many Bitcoin confirmations are enough, it depends on value of your fund in that transaction. The bigger value the fund is, the more confirmations you need to consider that transaction is done, finalized and won't be reversed.
How many Bitcoin confirmations is enough?If you are patient enough to wait for at least one confirmation then you are no longer vulnerable to race attacks or Finney attacks. Now your only concern is 51% attacks. What's the rule of thumb for an acceptable number of confirmations?
- 1 confirmation: sufficient for small payments less than $1,000.
- 3 confirmations: for payments $1,000 - $10,000. Most exchanges require 3 confirmations for deposits.
- 6 confirmations: good for large payments between $10,000 - $1,000,000. Six is standard for most transactions to be considered secure.
- 10 confirmations: suggested for large payments greater than $1,000,000.