What Starts a Crypto Bull Market

Disclosure: This article is analysis and opinion, not financial advice. See our full disclaimer.

Everyone in a crypto winter asks the same question, usually around month nine: what actually ends this?

Our winters analysis mapped who survives the cold. This is the companion piece: what history says about how the cold ends. Four completed cycles is a small sample, and I’ll flag where the sample is doing too much work, but the pattern across 2013, 2017, 2021, and 2024-25 is consistent enough to name its parts.

Three ingredients, every time. A supply story, a new door for money, and a macro tailwind. Bulls started when at least two showed up together. No single one has ever been enough.

Ingredient one: the supply story

Every cycle had a reason to believe coins were getting scarcer. The famous one is Bitcoin’s halving, the programmed 50% cut to new supply that landed in 2012, 2016, 2020, and 2024, each followed within roughly 18 months by a major bull peak.

Honest caveat before this sounds like a law of physics: four data points, and the halving is the most front-run event in the asset class. Whether halvings cause bulls or merely time them alongside other forces is genuinely debated, and the 2024 edition was the weakest of the four, arguably because ETFs had already delivered the demand shock before the supply cut arrived. The supply story matters. Treating its calendar as a guarantee is how people bought tops.

Supply stories also come in non-halving flavors: 2021’s was corporate treasuries vacuuming coins, and today’s quieter version is the 30%+ of ETH locked in staking with an empty exit queue. Locked supply is scarcity that doesn’t need a calendar.

Ingredient two: a new door for money

This one, in my read, is the real engine. Each bull coincided with a new way for a previously excluded group to buy.

2013: the first usable exchanges let ordinary tech-adjacent people in at all. 2017: ICOs plus smartphone trading apps opened the retail floodgates. 2021: zero rates, stimulus checks, and the first corporate and fund adoption. 2024-25: spot ETFs, the biggest door ever built, $52 billion through Bitcoin’s alone, putting crypto inside every brokerage account in America.

The uncomfortable implication for the next cycle: the doors get harder to top. After ETFs, what’s left is genuinely enormous but slower plumbing: retirement accounts and advisor platforms formally approving allocations, banks custodying for ordinary clients, and yield-bearing wrappers making crypto fit income mandates, the shift already visible in ETH’s ETFs. The next door probably isn’t a bang. It’s a series of compliance memos.

Ingredient three: the macro tailwind

Crypto has never had a major bull market against tightening liquidity. 2013 and 2017 ran on easy money, 2021 on the loosest conditions in modern history, and the 2022 winter arrived precisely with the fastest rate hikes in decades. The current cycle’s chop tracks rate expectations closely enough that our flow reports read Fed minutes like weather forecasts.

This is the ingredient crypto can’t manufacture for itself, and the one that makes cycle-timing humility mandatory: the asset class is, on the evidence, downstream of global liquidity, whatever its independence narratives say.

What the checklist says right now

Running today’s tape against the three: the supply side is mixed (ETH locking up while Bitcoin treasuries unwind, next halving not until 2028). The money-door side is quietly constructive: stablecoin supply, the market’s dry powder, sits at record highs around $320 billion, yield-passing wrappers are spreading, and ETF dip-buying keeps showing up. Macro remains the swing vote, parked at “watch the Fed.”

Score it honestly: one ingredient partially present, one building, one undecided. That’s not a bull market call. It’s a checklist that says the conditions are assembling slower than anyone’s patience, which, for what it’s worth, is roughly what the middle of every previous cycle felt like from inside.

The trap in all of this

Cycle analysis has a seductive failure mode: it makes waiting feel like knowing. Four cycles rhymed; nothing requires the fifth to. The doors thesis could stall on regulation, the macro could stay hostile for years, and “this time is different” has been both the most expensive and, occasionally, the most accurate sentence in finance.

Which is why the practical conclusion isn’t a prediction, it’s the position that doesn’t need one: scheduled buying of majors if you believe in the asset class at all, sized to survive being early by years, per the boring playbook. The people who caught every previous spring weren’t the ones who called it. They were the ones still solvent and still accumulating when it arrived without an announcement.

FAQ

What causes a crypto bull market?

Historically, the overlap of at least two of three forces: a supply-scarcity story (halvings, locked staking supply), a new access channel bringing in previously excluded buyers (exchanges in 2013, ICOs in 2017, institutions in 2021, ETFs in 2024), and loose macro liquidity. No cycle has started on one ingredient alone.

When is the next crypto bull run expected?

Nobody credibly knows, and dated predictions have a terrible record. The watchable signals: sustained ETF inflow streaks that survive red price days, stablecoin supply growth converting into exchange inflows, advisor platforms formally approving crypto allocations, and a clear turn toward easier monetary policy. The next Bitcoin halving lands in 2028.

Do Bitcoin halvings really start bull markets?

Each of the four halvings preceded a major peak by roughly 12 to 18 months, but the sample is tiny, the event is heavily front-run, and 2024’s cycle was the weakest, likely because ETF demand arrived first. Treat the halving as one supply input among several, not a schedule.

How long do crypto bear markets last?

The completed ones ran roughly one to two years from peak to bottom (2014-15, 2018, 2022), with recoveries to prior highs taking one to three years beyond that. Depths reached 77 to 93%. Every cycle’s timing differed enough that averages mislead more than they guide.

What are the earliest signs a bull market is starting?

In previous cycles: persistent accumulation during boredom (rising stablecoin reserves, whale wallets growing through flat prices), new-money infrastructure quietly launching before prices move, and rallies that hold through bad news. The loud signals (parabolic candles, mainstream coverage) historically marked the middle or end, never the start.

Is a bull market guaranteed after every bear market?

No. Four recoveries in a row is a pattern, not a promise, and plenty of individual assets never recovered at all: each bull lifted a different set of coins, with the previous cycle’s leaders often left behind. History supports resilience for the majors so far, silence about everything else.

Should you buy crypto before a bull market?

The honest reframe: since bull markets can’t be timed, the choice is between scheduled accumulation you can sustain through years of being early, or waiting for confirmation and paying substantially higher prices for the certainty. Both are defensible; the historically expensive option was a third one, buying only after the move was obvious and selling the next winter.

Which crypto rises first in a bull market?

Bitcoin has led every cycle’s beginning, with money flowing to it first as the deepest and most legitimized asset, then broadening to ETH and later to smaller assets as risk appetite grows. The 2026 flow data shows the same order operating in miniature: returning institutional money entered Bitcoin-first even while Ethereum’s yield story matured.