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This is a basic thing that must be owned (must exist) in planning for good money management because after all, even if we have a large amount of money or income every month from the income we have but when money management is poor and does not anticipate basic things such as for needs and reserve funds then indeed income will continue to run out without leaving anything.
This is clearly dangerous because after all we cannot predict what will happen in the future that we will pass through and with the reserve fund that has been prepared from the start, we will indeed be more able to breathe freely when there are things that are not wanted considering the money we will use for other things is not used by unexpected needs because we already have a reserve fund as a form of anticipation of it.
Setting aside income to be used as a reserve fund will not make you hassle, instead it will make it easier for you because in the end if the funds are not used then it can be used as a better thing such as investment or other things so that it will not make you lose.
The main aim of investment is to generate returns, this can be short term or long term. If you have a good long-term financial plan, then you will never ignore the opportunity to invest when you have a budget. Bitcoin investment is one of the most recommended besides real assets, but you should not invest 100% in bitcoin because at the same time you still have to have a reserve budget for other needs.
Prepare for the future better than now, invest the money to ensure that in your old age you won't have financial problems. Prepare your finances for the future so you can pay for your children's school fees and so on. By investing, these goals are possible to achieve instead holding fiat.
I see this slightly different. Of course an investment could in general generate returns both in the short and in the long term, but from what I understand investing is more about a long term strategy aiming at building wealth over the longer period of time and in a best case with a strategy in place. If someone aims for short term returns, it's pure speculation. There is a difference between flipping a coin and knowing whether your doubled your money within seconds, or whether you have a plan in place, put effort into the analysis of a potential investment and have a long term plan both for building your position and a possible exit scenario. When you flip a coin, what is the exit scenario? I wouldn't call that investing.