Historical data from 1871 to 2021 indicates that Lump-Sum investing statistically outperforms Dollar Cost Averaging (DCA) approximately 65% to 72% of the time across various time horizons. The post highlights a specific case where a cash position of $750,000 would have yielded an additional $150,000 in returns if invested immediately rather than incrementally. The overall sentiment favors "going all in" as the superior strategy for maximizing portfolio growth.