After seeing the answers that have been given to what the OP asks in this thread:
BTC as "every day" spending currency vs. 10 min Block Confirmation/Mining timeA couple of questions come to mind, which I thought it would be pertinent to ask in a separate thread.
The first one is how easy it is to create a fake transaction and transmit it to the whole blockchain without it being instantly detected as fake.
The second is: once we have a first confirmation of a transaction, how could it happen that the transaction is rejected by the rest of the miners? Would it mean that the first one is part of the scam if he validates that fake transaction or not necessarily? What would be the level of difficulty of doing this?
This comes to my mind because for day to day payments if the difficulty is high maybe some businesses could accept a transaction as soon as it is transmitted to the blockchain. There is a website where I have made several purchases and lately they show the payment as confirmed as soon as they detect that the transaction is transmitted to the blockchain, without waiting for the first confirmation. Obviously they are small amounts but quite larger than the price of a coffee.