I left for a while to get ahead with some research concerning what DCA is all about, so basically it's all about splitting your capital into equal parts and investing then on intervals, so let's say I have 500$ to invest in bitcoin, I can just divide it into 4 parts which would be 125$ and invest them weekly, and I learnt we do this to reduce the impact of market volatility on out investment. While lump sum is the exact different which involves just buying at once and immediately, it could be in whole or a large amount, but from what u read its mostly in whole.