DCA Into Bitcoin: The Math Behind $100/Month Over 4 Years

Here's a number that should make you uncomfortable: if you'd dropped $4,800 into Bitcoin as a lump sum at its November 2021 all-time high of $69,000, you'd be sitting at roughly $4,980 today — a 3.7% return over four and a half years. Savings accounts beat that. But if you'd spread that same $4,800 across 48 monthly $100 purchases starting April 2022, you'd have roughly $9,300. That's a near-100% return on the same dollar amount, in the same asset, over a shorter window. The difference is entirely mechanical — and that's exactly why DCA deserves a harder look than the hand-wavy "just buy regularly" advice it usually gets.

The Setup: $100/Month, Three Timeframes

We modeled a simple strategy: invest $100 into Bitcoin on the first of every month, no matter what the price is doing. No timing, no signals, no opinions. Just a recurring buy. We ran this across three windows ending April 12, 2026, with BTC at $71,747:

• 4-year DCA (April 2022 – April 2026): 48 purchases, $4,800 total
• 2-year DCA (April 2024 – April 2026): 24 purchases, $2,400 total
• 1-year DCA (April 2025 – April 2026): 12 purchases, $1,200 total

The results diverge dramatically, and the reasons why tell you everything about when DCA actually works.

4 Years: The Bear Market Was Your Best Friend

Starting in April 2022 was brutal. BTC was at $40,000 and about to fall off a cliff — Luna collapsed in May, dragging prices to $20,000. Then FTX imploded in November, pushing BTC below $17,000. Anyone who bought a lump sum in April 2022 watched half their money evaporate within eight months.

But the DCA buyer? They were accumulating aggressively at the bottom. Here's what the math looks like by year:

• 2022 (12 buys): ~$1,200 invested at an average price of ~$22,000 → 0.0545 BTC
• 2023 (12 buys): ~$1,200 at an average of ~$29,000 → 0.0414 BTC
• 2024 (12 buys): ~$1,200 at an average of ~$67,000 → 0.0179 BTC
• 2025–26 (12 buys): ~$1,200 at an average of ~$72,000 → 0.0167 BTC

Total accumulated: ~0.1305 BTC Current value: ~$9,360 Return: +95%

The critical insight: those first 24 months of "losing money" actually purchased 73% of the total BTC stack. The bear market was the engine of the entire return. By the time prices recovered, the DCA buyer was holding a fat position acquired at an effective cost basis around $36,800 — roughly half the current price.

2 Years: The Flat Zone

The 2-year DCA starting April 2024 tells a completely different story. BTC was already at $64,000 post-halving, and the next 24 months were a round trip — a surge toward $100,000 in late 2024, then a grind back down to the low $70,000s.

• Total invested: $2,400
• Average cost basis: ~$69,500
• BTC accumulated: ~0.0346 BTC
• Current value: ~$2,480
• Return: +3.4%

Basically flat. The DCA buyer captured some of the rally but also kept buying on the way down. With no deep bear market to load up during, the strategy produced mediocre results. You could have earned more in a money market fund.

1 Year: Catching a Falling Knife (Slowly)

The 1-year window is the most sobering. BTC was trading around $84,000 in April 2025, and it's been mostly downhill since. The DCA buyer's average cost lands around $73,000 — above today's price.

• Total invested: $1,200
• BTC accumulated: ~0.0164 BTC
• Current value: ~$1,177
• Return: -1.7%

A small loss. Not catastrophic — a lump sum at $84,000 would be down 14.6% — but DCA didn't turn a losing period into a winning one. It just made the loss shallow.

What DCA Actually Does (and Doesn't Do)

The math reveals something specific: DCA's superpower is volatility harvesting during prolonged downtrends. It doesn't magically generate returns in flat or declining markets. It works because:

1. You buy more units when prices are low. At $17,000 your $100 buys 5.9x more BTC than at $100,000. DCA mechanically overweights cheap periods. 2. It eliminates the worst-case lump sum scenario. A lump sum at April 2022 highs returned ~79% by today. The DCA returned ~95%. But a lump sum at the November 2022 bottom (~$16,500) would have returned 335%. DCA trades away the best-case to kill the worst-case. 3. It requires a recovery. If BTC had stayed at $20,000 forever, the 4-year DCA would show a loss too. The strategy needs the asset to eventually mean-revert upward.

The uncomfortable truth: with Fear & Greed at 8 and sentiment at "very bearish," right now might actually be one of those bear-market accumulation periods that make future DCA returns look incredible in hindsight. Or it might not be — the 2-year and 1-year numbers prove DCA isn't a guarantee.

The Practical Playbook

If you're considering DCA into BTC today, the historical data suggests a few concrete rules:

• Commit to a minimum 3–4 year horizon. Every profitable DCA window in Bitcoin's history needed at least one full bear-to-bull cycle.
• Don't stop during drawdowns. The 2022 purchases — the ones that felt the worst — generated the vast majority of the 4-year DCA's returns.
• Size it so you won't flinch. $100/month only works if you actually do it for 48 months. Pick a number you'd be comfortable burning entirely.
• Track your cost basis. Invesaro's coin pages show historical price data that makes it easy to benchmark where your DCA stack stands relative to market.

The lump-sum-versus-DCA debate is largely academic. In practice, most people don't have $4,800 sitting around waiting to be deployed — they have $100 showing up in their account every month. DCA isn't a strategy you choose. For most people, it's the only strategy that's realistic. The data says that's fine, as long as you actually stick with it through the part that hurts.