For years I was afraid to invest. Not because I didn't have money, but because I had too many unanswered questions: what if I invest and the market crashes? When is the "perfect moment"? Am I walking into a trap? When I finally started really investing, it wasn't because those questions disappeared, but because I chose a strategy that made them almost irrelevant: dollar cost averaging.
Why investing everything at once paralyzes me
Suppose I have €10,000 saved. Theoretically, if I put all €10,000 into index funds right now, I should get a return over 20-30 years that transforms that money. But: what if there's a 10% correction in the coming weeks? What if there's a 20% drop in the coming months? Mathematically, I know that's just noise in the long term. Emotionally, seeing €2,000 disappear in a week after I just put it in is devastating.
Some would say: "it's just noise, ignore it." But I know myself. I know I'm going to obsessively check my portfolio. I know I'm going to regret it. And worst: I know I'll probably sell at exactly the wrong time in a panic.
Why monthly cost averaging changed my mindset
Instead of getting stuck in the paralysis of seeking perfection, I chose something simpler: invest €500 every month, always, no matter what.
Suddenly, the equation changed. If the market drops 10% next month, I'm happy: my next €500 buys more units. If it goes up 10%, that's good too: I've made money on previous contributions. Statistically, I gain by buying more when it's cheap and less when it's expensive. But most importantly: the decision becomes automatic. There's no thinking involved.
Three years ago I started this way. I've lived through market crashes, volatility, geopolitical movements that scared everyone. And every month, without thinking, following the plan. You know what happens? My capital has grown consistently, and I've never once had to face the temptation to panic-sell.
The uncomfortable truth: I probably would have made more money investing everything at once
Statistically, it's true. In markets with upward trends (like the historical trend over the last 50-100 years), investing all available capital at once beats dollar cost averaging on average. Money that isn't invested is money that isn't growing.
But here's my unpopular opinion: that extra money you could have made isn't worth the psychological cost of living in panic during crashes, nor the risk of ruining it all by selling when the market drops 30% because you couldn't handle the emotional pressure.
It's mathematically suboptimal. It's emotionally optimal.
It's not just strategy, it's realistic for most people
Besides, let's be honest: most people don't have €10,000 in a lump sum to invest. They have a monthly salary from which they save €300-500 after expenses. For that person, dollar cost averaging isn't a chosen strategy; it's the natural way investing happens. You don't have a choice.
But even if you had large initial capital, I'd still recommend it, even if only partially. Invest a third now, a third in 2-3 months, the last third in 5-6 months. It's not mathematically optimal, but it's emotionally optimal, and that matters when you have to live with your decision every day.
The real benefit: that you keep following the plan
Any investment strategy that requires you to make complicated or emotional decisions is destined to fail. Dollar cost averaging isn't the best possible strategy in a perfect world. But it's the best strategy you'll probably stick with for 20-30 years without giving up.
And that, in the long run, beats any marginal gain you could have gotten by being mathematically more aggressive.
So yes, I probably would have made 5-10% more if I'd invested everything at once in 2021. But I also would have slept poorly during the 2022 crash. And the net result—more money plus peace of mind—is priceless.