Yes naire earners can still keep up with their Bitcoin pursuit. Despite the high rate of hardship and economic crisis and depreciation of naira there are till investor who are earning well in there place of work that is Investing massively in Bitcoin steadily using there DCA strategy to accumulate More Bitcoin since they have a good income flow they will able to hodl there Bitcoin for a longer period of time in order for a better profit since Bitcoin is best sighted for a long term plan. Since they have a good cash flow they will set aside an emergency fund reserve, and float fund incase an unforeseen circumstances occur they can be to solve it through there reserve fund without selling out there Bitcoin hodling.
Indeed, the country is in a very messed up state and the leaders seem not to care much, so it's left for the citizens to find their way out of this crisis, concerning the possibility of naira earners being able to invest in Bitcoin, it's possible just as you've stated, but you're going to need a very solid investment or accumulation plan, because no matter how well you're earning in this country, as long as it's still in naira, there'll always be somewhere to spend it, and it'll never be enough, so it's gonna be even harder to come up with a good bitcoin stash without a good plan.
Like we already know, you'll first need to build a solid emergency fund before you can even think of beginning your Bitcoin accumulation, else you'll surely encounter several setbacks that'll mess with your investment plan, especially when those plans are long-term.