I have two sets of funds.
One for buying dip
One for real issues whatever those issues are.
Today I purchased dip.
What if buying the dip turns into a real issue?

Which account are you using then or justify to make use of?
Buying the dip will never be an issue if you program your discrentionary income very well.
I can spare money for parties, and recreational activities in other to buy the dip.
Except your income stops coming perhaps you quit your job, get sacked or stop having client in your business. Only then can buying on dip be limited.
Just as you have said buying at the dip with some viable strategy it is not advisable to make if you have a well planned discretionary income you can take advantage of the market downturn without compromising your stability, and also your points about income continuity is not advisable as long as your income remains steady one can continue to buy at the dip season however if one's income is determined due joblessness, business turn down it advisable for them to reassess your income priorities and quickly make your adjustments income strategy accordingly.
For an investor who's accumulating/buying bitcoin consistently and weekly using DCA strategy should see the Dip as an advantage because at that moment he will accumulating more bitcoin faster at a considerable cheaper rate. Bitcoin Dips shouldn't be a problem for an investor using DCA strategy,it's doesn't affect his plans of buying weekly as long his financial streams of income is still flowing and still remain intact, and his Emergency funds will be his backup funds in case of any urgent situations arises in the future. At this moment the investor plans to Hodl for a long term for at least 10 - 15years remains resolute and achievable.
DCA is for those who don't have much discretionary income available
I disagree with you on this, investing in Bitcoin is not cheap as DCA isn't for those that are low in come rather Investor Using DCA prefer it because it's the best strategy that align with their plans to accumulate Bitcoin.