sorry i meant that for coffee you dont need to wait for a confirmation, a zero confirmation transaction for $5 is safe enough, no one is going to bother to doub

sorry i meant that for coffee you dont need to wait for a confirmation, a zero confirmation transaction for $5 is safe enough, no one is going to bother to double spend against that as the computational power required means it is not economical to do so. Zero conf transactions are almost instantaneous