On average, I spend around $8 per day, considering my earnings and the economic conditions of my country.
Are you single? That amount is too small for a family person but I think if you're a single guy and doesn't have any obligation, that's sufficient.
However, this question solely depends on individual’s lifestyle, responsibility amongst others and priorities differ greatly. As for programming daily expenses, it is possible to develop systems or tools to help track and manage finances effectively.
There are apps in the playstore or app store where you can download to help you track with your expenses and budgeting. These daily expenses doesn't need to define whether you're a bitcoiner or a trader or anyone in the market that's not so popular.
With proper planning and disciplined execution, such programs can contribute to more efficient financial management and help achieve long term goals.
Despite that, there are still people that are living in countries with high inflation rate and that's why they're having hard time to budget their needs.
Because a $10 worth of goods today, could be $11 or $12 or more by tomorrow.