picture a barber shop with four chairs. the owner is proud of it. last spring he added a new way to pay, and he taped a small sign by the mirror to say so. he knows how it works. he set it up himself on a slow tuesday. now picture a busy friday when he is out. a customer finishes his haircut at chair three and asks to pay the new way. the barber at chair three has never opened the app. there is a line by the door. he says what any of us would say. "can you use your card today?" the customer taps a card. the sign stays on the mirror. that moment is where i look when people talk about shops taking bitcoin. let me walk through it. bitcoin is digital money that moves without a bank in the middle. for small purchases most shops use lightning, a faster network built on top of bitcoin for everyday payments. to get paid, the shop's app shows an invoice, a one-time request for an exact amount, drawn as a square code the customer scans with a phone. all of it can be learned in ten minutes. someone still has to teach it. a card reader needs no lesson. every barber in that shop has used one a thousand times. the new way lives in one person's head, and that person goes home at night, takes holidays and gets sick. so here is my claim. a shop takes bitcoin as often as the person standing at the till knows how. i would trade the sign on the mirror for ten minutes of practice with every member of staff. the other side has a fair point, and i want to give it room. maybe training changes nothing, because customers are not asking. a barber can know every step and still go a month without one request. if the demand was never there, teaching the staff will not create it. that could be right. what would show me wrong: shops where every worker has been trained and has practiced, and the share of customers paying this way stays as low as before. bitcoin has worked the same way every day since 2009. the money was ready long ago. on a busy friday the question is whether the barber at chair three is ready too. if this made you think about who is standing at the till, Zap ⚡