TL;DR Cashless payment systems like cryptocurrencies are on the rise, therefore the payment networks have to handle a certain load corresponding of how many people are using it, studied here in transactions per second (tx/s). For cryptocurrencies: — an adoption share of 0.2 % of all cashless payments in Europe, would result in an average x̅ of 23 tx/s and a peak of 33 tx/s — an adoption share of 2.0 % of all cashless payments in Europe, would result in an average x̅ of 227 tx/s and a peak of 332 tx/s — an adoption share of 1.0 % of all cashless payments in Germany would presumably lead to 3.3 million people using cryptocurrencies for 1.4 transactions per week per person at a rate of 0.8 transactions per day per person — A 5.0 % transaction share in Germany with people using for all cashless payments 25 % cryptocurrencies at a rate of 0.8 transactions per day per person would result in an average of x̅ 69 tx/s and a peak of 110 tx/s — adoption will take place first with online merchants, already possible to day at low adoption shares for some unique cryptocurrencies + incentives for merchants are already higher than drawbacks