I don't know how left over funds after one has made all his expenses for the time being which is discretionary income and fund thats been kept for emergency or any unexpected stuff which is reserved funds will be the same,
Discretionary income, emergency fund and reserve fund are 3 different things but you are getting it complicated you still tag emergency fund and reserve fund as thesame thing i think they are two different things, emergency fund has it purpose when it comes to Bitcoin investment reserve fund also serve on a different purpose. Emergency fund is there to care of real emergencies when they happened to prevent you from selling soon when the unexpected occur, while the reserve fund is there to accumulate Bitcoin expecially when there is a decline in price one can use his reserve fund to accumulate more Bitcoin so stop seeing emergency fund and reserve fund to the same.
It is necessary to be aware of these issues, all types of funds should not be mixed together, rather each fund has a different purpose, and all those funds should be used according to that purpose, if any fund is used outside the purpose, it can only create problems. For example, emergency funds are created only to deal with unexpected financial situations so that your Bitcoin investment is protected in the long term, on the other hand, reserve funds are kept to take advantage of the opportunity to buy DIPs if Bitcoin drops slightly due to volatility, but in this case,
if you mix up the purposes of these funds, and later buy Bitcoin DIPs with emergency funds, then how will you handle that unexpected situation if your financial unexpected situation comes to the fore? So you must be aware of these issues, and each fund should be used according to their purpose, then it is possible to keep the investment safe in the long term.
Well in Bitcoin investment no money is made permanent for a particular usage, the usage of this funds are not rigid but flexible and adjustable base on situation and or circumstances.