"Considering the current state of the cryptocurrency market and the inherent volatility associated with digital currencies, using Bitcoin to purchase something as ordinary as your lunch may seem a bit unconventional and somewhat irrational. While the idea of paying for everyday items with Bitcoin has gained traction in certain circles, many people still find it hard to wrap their heads around the concept of exchanging a highly fluctuating asset for a simple meal. Additionally, the potential transaction fees, the speed of the transfer, and the fluctuating value of Bitcoin could lead one to think that the whole practice is, in truth, a little crazy."
source: https://blocknews.com/why-using-bitcoin-to-buy-your-lunch-is-still-kinda-nuts/