Quote from: CoinATMRadar on June 23, 2014, 10:08:54 AM

Quote from: Mayuyu48 on June 23, 2014, 08:43:24 AM

for example you buy a cup of coffee using BTC, you must wait until 10-15 minutes
maybe we must pay at first and wait that bitcoin payment confirmed while we drink coffee Grin

No, payment is done immediately and the shop receives it immediately, you don't have to wait at all.
as said before by others - the only question is a trust to this transaction, for which you need to wait for any confirmations.

But as it is something not that simple to make a double spend - nobody would try to do this for a cup of coffee.
This is similar like creating a fake credit card to go to pay for you coffee, definitely this is possible today, but nobody does it.
Same with Bitcoin.

yeah i mean it's about confirmation Grin

many merchant need some confirmations to make transaction done
agree, nobody will do like that just or a cup of coffee
so we can trust this transaction