That's what I wanted to avoid, I don't like the idea of buying btc at the beginning of the month and selling at the end of the month, it's like timing the market. During bull phase it's probably working flawlessly but if you had a 40% drop during that month you don't really want to pay almost double in btc terms of what you've got at the beginning of the month. My idea is to try spending btc directly, although most of the time these are just the gift cards, it protects you from the volatility in a way.