What do you mean when you say it drives its own units interest, you mean you got more money in fiat or you've made a good crypto investment that generated more Bitcoins in interests? I wouldn't call unrealized profits from a fiat investment in BTC interests to be honest. Because to realize your gains you need to be able to sell your Bitcoins at the right time, that is to say during a lucky moment when the selling price is above the price you've paid to acquire your Bitcoin, or your break-even point at least.
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No I don't think so, Op briefly was referring to how he had managed to be successful with his bitcoin investment by accumulating a sum of bitcoin using the Dcaing to buy little amount of bitcoins with his spares cashes to increase the value of his portfolio quite realized that the value of your holding highily reciprocates to the volatility volatility of the market.
That's to say when you holds a small value of bitcoin, that means during a market increase, so your accumulating interests will be small and when you holds a big amount of bitcoin, so as well your interest being profits will be high. Same reciprocation to determines a hedge to your losses when the market is down.
It's an encouragement to always stack bitcoin even with the least amount of spare funds with us unlike those who neglects the potential value of what your little amount money can do for you when sequentially accumulating bitcoin with it for a long time.