Even for myself, I don't target quick profits in the investments I have made because I put in an amount that may be small enough for them but not too small for me. Maybe that's the example where I target investment in the long term so a small increase will not see a profit in my portfolio but at some point in the future I think I will see a larger percentage in profit and that may be decades in the future.
It's quite right as you say because if big investors can buy 2 BTC or 5 BTC at once then they will see quite a profit if the BTC increase is above 5%>. Even if we bought $10 in Bitcoin when the price was $15k and now it is $42k then we have seen quite a significant profit in our investment but that is according to the capital we put down. For the long term, it may not be possible to calculate the increase in the short term because the target could be an investment made for in the next 10 years.
People tend to make the mistake of investing little amount of money into buying Bitcoin and lay their hope on getting huge profit within a limited time frame forgetting the higher amount invested the greater your profits.
The DCA has made it very easier for small investors to venture into the market and still make profit, despite the DCA approach being a long term strategy but you don't blame oneself as not being efficient enough to buy in bulk. Of a truth the market is most favorable to whales as a 10% up in price is already giving them good profits per what they invested.