I believe was two individuals buying bitcoin from an ATMIf they were buying . Then it seems reasonable to me to leave the ATM as soon as they have a zero conf transaction incoming All I could think during this scene was damn , the mempool is massive right now and that transaction probably won ' t confirm for hoursEven with an empty mempool , it can still take several hours to get a confirmation . A large mempool is not the cause of this problem . Expecting to wait for a confirmation at an ATM is simply not appropriate , regardless if blocks are full or not . The ATM probably has a hardcoded fee for transactionsIf it great that the ecosystem tries to address these problems now , rather than in a few years time when the ecosystem could be even larger . We need SegWit . We need bigger blocksI agree , having larger capacity and bigger blocks right now is a great idea . Luckily SegWit does both of these things . SegWit offers a massive 100 % capacity increase . However , when it comes to a hardfork , in my view , the right collaborative climate does not exists in the community right now to do this safely . If people have ideas over how to do it safely then that may help .