I largely agree with your post, except your assertion that it is a bit late is a bit of a misleading assertion, especially if a person happens to be a brand new investor then it is not too late. He has to start investing into bitcoin as soon as possible.
I fully support your statement. In terms of investing in bitcoin, it is never too late if we want to remember how BTC journey since 2013 with a price around $100 and now it has reached $100k in 12 years.
you may be right in term of explaining that it is never too late for an investor to buy bitcoin, but the aspect of bitcoin starting since 2013 at the rate of $100 may be misleading to a newbie who is new here and may never get clear idea about bitcoin history. so for more clarity i will say according to research, bitcoin was launched exactly at January 3, 2009 with basically 0 value in $ until until may 2010 when it gain value by $0.01. so basically bitcoin is over 15 years and not 12 year, starting from the time it was launched.
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Well it is true as long as you are buying bitcoin at regular intervals with fixed amount of money it is still dca strategy let's take for instance if the price of bitcoin for 3days was $82k, $72k and $65k respectively. Now if an investor is buying with $10 every day for 3 days the investor has invested $30 dollars into bitcoin.when the price was $82k, bitcoin accumulated is $10/$82k which is equal to 0.000121btc.for $72k is $10/$72k which is 0.000139btc and for $65k is $10/$65 which is 0.000154btc.now the total BTC accumulated for this 3 days is 0.000414btc .To know if the investor is actually doing DCA ,lets get the average cost for each BTC , which is $30/0.000414. which will be $72463 per BTC. So I believe this my explanation has made it more clear for those that are entertaining any form of doubt that buying bitcoin every day is not dca,it is DCA as long as the investor is keeping up with DCA rules.
Is it compulsory that the dca amount must be a fixed amount?
from my point of view i think that proty made only an assumption and not could have had an intention of making his accumulation process so rigid.