Building an emergency fund before Bitcoin investment is a kind of security for you Bitcoin portfolio a d DCA jurney, because by having that emergency found, you will not have any pressure on your Bitcoin investment and that way, regardless of your overall income and cash flows you can comfortably buy and hold Bitcoin for long term.
A lot of newbies in Bitcoin investment have made the mistake of buying Bitcoin when they have no emergency found or even not having a good stable income to hold Bitcoin comfortably without exchange them when they hard pressure.