The ProShares Bitcoin Strategy ETF — better known by its ticker BITO — made history on October 19, 2021, when it became the first Bitcoin-linked ETF to launch on a major U.S. exchange. Within 48 hours, the fund pulled in nearly $1 billion in assets and traded over 24 million shares on day one, making it one of the most explosive ETF debuts in history. Crypto wasn't just a fringe asset class anymore — it was on Wall Street's main stage.

But BITO is not a spot Bitcoin ETF. It tracks Bitcoin futures contracts on the Chicago Mercantile Exchange (CME), giving investors indirect exposure without touching actual BTC. That distinction matters more than most headlines suggest, and it's shaped how the fund has performed — and where it fits in today's ETF landscape.

What Exactly Is the ProShares Bitcoin ETF?

BITO is the brainchild of ProShares, a Maryland-based issuer famous for leveraged, inverse, and thematic ETFs. The fund's job is simple: mirror the price of Bitcoin using CME-traded futures, then package that exposure into a familiar exchange-traded wrapper that any brokerage account can buy.

For U.S. investors who'd been locked out of crypto through traditional channels — think IRAs, 401(k)s, or compliance-restricted advisory platforms — BITO unlocked a door that had been bolted shut. You didn't need a wallet, a custodian, or a willingness to navigate crypto exchanges. You just needed a brokerage login.

The Structure in Plain English

  • Futures-based exposure: BITO buys front-month CME Bitcoin futures, not actual coins.
  • Monthly rolls: Contracts are rolled forward to maintain ongoing exposure.
  • Regulated wrapper: Traded on NYSE Arca under standard ETF rules and disclosures.
  • No wallet required: Custody, security, and key management are handled by the fund.

The Historic Launch and First-Year Frenzy

October 2021 felt like a watershed moment for crypto adoption. Bitcoin was climbing toward its then-all-time high near $69,000, and retail mania was everywhere. BITO's debut landed right in the middle of that frenzy — and the numbers told the story.

  • $1 billion in assets under management within the first two trading days.
  • 24 million+ shares traded on day one, second only to a handful of record-breaking launches.
  • Backlog of pending applications: Rival issuers rushed to file their own futures-based products in BITO's wake.

The launch was so successful it triggered a wave of imitators. By early 2022, several other futures-based Bitcoin ETFs hit U.S. exchanges, including products from Valkyrie, VanEck, and others. Even a short Bitcoin ETF from ProShares — ticker BITI — launched in 2022, giving traders a clean way to bet against BTC without dealing with margin calls on offshore exchanges.

Then came the 2022 crypto winter. Bitcoin cratered below $16,000 by year-end after the FTX collapse, and BITO went down with it — shedding more than 75% from its highs. Holders got a brutal reminder that futures-based ETFs inherit the same volatility as the underlying asset. No wrapper can dampen that.

BITO didn't make Bitcoin safer. It just made it easier to buy — and easier to lose money on.

Contango: The Hidden Tax on BITO Holders

One of the most overlooked features of futures-based ETFs is contango. When futures contracts trade above spot prices — which happens often in crypto — the fund sells cheaper expiring contracts and buys pricier ones each month. That drag compounds over time and can cause BITO to underperform spot Bitcoin over long holding periods.

It's not a guaranteed loss, but it's a structural headwind that didn't show up in the headlines during the launch hype. Investors who held BITO through the 2022 bear market experienced it firsthand.

Spot Bitcoin ETFs Reshape the Field

On January 10, 2024, the U.S. Securities and Exchange Commission approved the first spot Bitcoin ETFs, including landmark products from BlackRock (IBIT), Fidelity (FBTC), and ARK Invest (ARKB). Within months, these spot funds pulled in tens of billions of dollars and rapidly overtook BITO in total assets.

Spot ETFs hold actual Bitcoin through regulated custodians, sidestep contango, and offer cleaner long-term tracking. For most buy-and-hold investors, they've become the obvious choice. So is BITO obsolete?

Not quite. Here's where the futures-based fund still has a role:

  • Short exposure: BITI offers inverse Bitcoin exposure in a regulated ETF wrapper — no margin, no offshore platforms.
  • Futures curve plays: Active traders can use BITO to express views on futures pricing, basis trades, or contango.
  • Account flexibility: Some tax-advantaged or restricted accounts may still favor the futures structure.

Key Takeaways

The ProShares Bitcoin ETF was a turning point in the history of digital assets. It cracked open Wall Street's door to crypto exposure, set records on day one, and inspired a wave of competing products that ultimately led to the approval of spot Bitcoin ETFs in 2024. BITO isn't the dominant choice anymore, but it remains a useful tool for traders, hedgers, and anyone who wants exposure to the futures market or a built-in shorting vehicle.

Just remember the trade-offs: contango drag, amplified volatility, and the same risk profile as Bitcoin itself. BITO made crypto easier to buy — but it didn't make it safer. Know what you own before you click buy.