I agree, it is best to know the things that is really needed and those that are less important be set aside. another approach is separate 10% to savings and use the remaining for the monthly budgets. This might be a bit hard if you are not used to doing it but you will find it will be a life saver in the future.
You cannot deny that you need to have a savings. But if you have very limited budget or income, it is hard to constantly save on payday. The only way to get a steady saving is increase your income. Fortunately, bitcoin can provide some extra income. And if you know how to do cryptotrading, there is more money you can get. You are not limited from what you earn from your day job.
That is just easy to say, but really hard to do especially if you barely have enough for your basic needs. You cannot remove basic needs like food, shelter and medicine. You need them to survive daily. Like in our country, the basic salary is way lower than what is needed to live a decent lives. And some people does not even receive minimum salary.