After securing our emergency fund that could last for about 3 months, using lump sum would be a great idea. Because how far you go in your accumulation is determined by the opportunities you took advantage of when the price was still low.
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From what I understand, OP has been struggling financially with the passion to invest in bitcoin sooner. Until he was capable of saving a little to buy his first bitcoin. I am kind of certain that OP does not keep money for emergency funds. He sounds like an individual in that whenever he receives his income, he settles the housekeeping bills and thinks of where to invest his money next. So this made him save up regularly to start an investment.

If OP's monthly income is stable, I think the best thing to do to accumulate bitcoin faster is to DCA consistently, but if his income is not steady and it varies from different prices based on his work input, I will suggest saving up for 3 to 6 months and lump sum.