I don't know where you read about Wyckoff reasoning of lack of supply leading to breakouts or building a momentum. But what I have read about Wyckoff method is that a selling climax or spring should be accompanied by an increase in volume to show expanding participation. He used increased volume to confirm a reversal, breakout or a trend. As much as I have read, low volume means nothing as it shows lower buying/selling powers which are incapable of bringing any market trend. And in the highly manipulated market as that of cryptos, low volume means nothing at all.