Lump sum investing wins roughly two-thirds of the time because markets go up more than they go down. The longer you delay putting money to work, the more growth you miss.
Drip feeding (pound-cost averaging) reduces your exposure to short-term crashes. If a 20% drop in month one would keep you awake at night, spreading the investment out is a valid choice.
The best strategy is the one you actually stick with. A perfect plan you abandon after a market dip is worse than a good-enough plan you hold for 20 years.
