Everyone loves shouting "HODL" and "Diamond Hands" during a bull market. But when your portfolio stagnates for months, enthusiasm fades and boredom sets in.
It is at this exact moment that the vast majority of investors make a fatal mistake: selling everything to jump onto yet another trending shitcoin or to try their hand at trading—potentially destroying their capital.

The Boredom Illusion (The Early-Years Trap)
Imagine setting up a DCA (Dollar-Cost Averaging) plan on your favorite app (exchange, neobank, etc.) for an automatic purchase of €200 per month.
Three or four years go by. You open the app and see that you’ve accumulated capital, but the profits are minimal—perhaps 10–15% in total. Meanwhile, on X, you see "gurus" making 300% in a week on a memecoin.

You feel stupid. You think DCA doesn't work. So, you sell your solid position to chase the "big score," thereby falling right into the trap.

The real numbers: what happens if you don't touch anything?
Example: let's say we keep investing our modest €200 a month for 30 years, with an average historical annual return of 7%.
You would have invested €72,000 and ended up with €234,000 (factoring in that annual return).
An excellent result. The real hurdle, however, isn't financial—it's psychological. Our brains are wired to think linearly; it feels natural to believe that halfway through the timeframe (15 years), we should have earned roughly half the money. This is where compound interest tricks us, because it operates on an exponential curve. The secret of the 57% (the real cost of quitting)
After 20 years of contributions, your account will hold approximately €100,000.
Stop and think about this for a moment: you waited 20 years to reach €100k, yet in the following 10 years, the account skyrockets to €234,000. This means that over €132,000—57% of the total wealth—is generated out of thin air solely during those last 10 years.

The early years seem to yield nothing because they are literally laying the foundation that compound interest will leverage to surge upward at the end.

If you invest for 15 years and then get tired and close everything out, your brain will tell you that you’ve made "a good profit for having gone halfway." The math will tell you that you killed the growth curve just moments before it went vertical. You walk away with crumbs while leaving the real money on the table.

The exception to the rule: the "Take Profit" dilemma
What happens if your asset suddenly jumps 20% or more in a few weeks (or even days)?
Cashing in profits makes perfect sense to protect yourself against market crashes and secure fresh liquidity. To do this without ruining the long-term math, apply this simple rule: split your capital in two.

Create a main, untouchable portion earmarked for long-term DCA (the part you won't touch, so you can harness compound interest) and a small "satellite" portion dedicated exclusively to trading and cashing in quick profits. This way, you lock in sudden gains without ever sabotaging your future capital.

Thanx for reading! If you found this article helpful, please leave a life, drop a comment, a tip and follow me for more insights on finance and crypto :)

Looking to start building your porftolio or earn some extra crypto on the side? Here are the platforms I personally use and recommend:

Trade Republic: Invest in ETFs, crypto and stocks with zero-fee savings plans. You also get a 1% Saveback on all card purchases and earn 2,50% interest on your uninvested cash.
https://refnocode.trade.re/9zkh0s28

Timebucks: Get paid for exeryday simple tasks with a daily earning potential of up to €50.
https://timebucks.com/?refID=225018746

RewardsJoy (formerly CoinpayU): Earn crypto/cash rewards up to €50 a day by completing offers and viewing ads.
https://www.rewardjoy.com/?r=KMatt8

Clickworker: Join the AI revolution! Make around €100/200 a month by training AI models and completing easy daily tasks
https://www.clickworker.com/clickworker?customer=false&utm_source=21679229&utm_campaign=CW4CW&utm_medium=email

Cointiply: Earn free crypto daily through simple tasks, surveys and faucets.
https://cointiply.mobi/WMmnJ