When Jack Dorsey rebranded Square to Block in late 2021, many wondered if the company would drift away from crypto. The opposite happened. Block Inc. has quietly become one of the most influential crypto exchanges in the world, and the Square crypto exchange legacy is bigger than most traders realize. From Cash App's Bitcoin rails to the open-source TBD project, the Square DNA still powers a meaningful slice of on-ramp volume across the United States.

The Square-to-Block Pivot: More Than a Name Change

Square launched in 2009 as a tiny card reader for small businesses. A decade later, the company added Bitcoin buying through Cash App, and crypto went from side project to strategic pillar. The 2021 rebrand to Block was less about abandoning the Square name and more about signaling a broader fintech vision that puts Bitcoin and decentralized tech at the center.

Block's structure now includes several arms. Cash App handles retail Bitcoin purchases, while TBD is building open-source infrastructure for a decentralized exchange. Proto and Bitkey round out a stack focused on mining, self-custody, and developer tooling. Each piece traces back to the original Square philosophy of making money movement frictionless.

How the Square Crypto Exchange Actually Works

Most users interact with the Square crypto exchange through Cash App, which lets anyone buy, sell, send, and withdraw Bitcoin with a few taps. The onboarding is famously simple, and that simplicity is the product. There is no complex order book for beginners, no intimidating charts, and no minimums that lock out first-time buyers.

Under the hood, the infrastructure is more sophisticated than the UI suggests:

  • Self-custody withdrawals let users move BTC to personal wallets
  • Lightning Network integration powers instant, low-fee Bitcoin transfers
  • Regulated custody partners hold assets for users who leave funds on-platform
  • Real-time pricing sourced from multiple liquidity providers
The genius of the Square approach is meeting users where they already are, instead of forcing them into a trading-floor mindset.

Bitcoin-First, Not Bitcoin-Only

Square and Block are unapologetically Bitcoin-first. Jack Dorsey has repeatedly called Bitcoin the native currency of the internet, and that conviction shows up in product decisions. While compe*****s chase altcoin listings, Block keeps its core exchange focused on BTC, exploring the rest of the crypto world through adjacent projects rather than the main app.

That focus is a competitive moat. Bitcoin holders know exactly what to expect, and the company has built a brand around long-term conviction rather than speculative churn. The trade-off is a smaller menu of tokens, but for many users, that restraint is the feature, not the bug.

The Bitkey Wallet and the Self-Custody Push

Bitkey, Block's hardware-backed self-custody wallet, is the next logical step. It signals that Block doesn't want users to be permanently parked on its exchange. Instead, the company wants to be the easiest on-ramp and the smoothest bridge to true ownership, an interesting tension for any exchange.

Why the Square Crypto Exchange Matters for the Industry

Cash App routinely ranks among the top Bitcoin on-ramps in the United States by retail volume. That kind of distribution is almost impossible to replicate. While legacy exchanges fight over pro traders, Block keeps winning the casual buyer, the gig worker, the teenager with twenty dollars, the small business owner.

That audience is also where the next wave of adoption lives. By keeping fees low and UX clean, the Square crypto exchange has done more for grassroots Bitcoin adoption than most dedicated platforms. Critics argue the simplicity hides costs, and they aren't wrong, but the alternative is a complex interface that scares newcomers off entirely.

What to Watch Next

  • TBD's decentralized exchange progress and open-source ecosystem growth
  • Proto mining initiatives and how they tie back to user rewards
  • Regulatory developments around US Bitcoin on-ramps
  • Expansion of Lightning payments inside and outside the Cash App ecosystem

Key Takeaways

The Square crypto exchange, now operating under Block Inc., is a study in patient strategy. It started as a side feature in a payment app, then evolved into a Bitcoin distribution machine. By refusing to chase every shiny token and by investing in self-custody, mining, and open-source infrastructure, Block has built a quieter but more durable kind of exchange empire.

For users, the message is simple: if you want a low-friction way to buy, sell, and eventually self-custody Bitcoin, the Square lineage is still one of the most accessible doors into crypto. For the industry, it is proof that conviction and clean UX can beat feature bloat, and that the next million users probably won't arrive through a screaming trading dashboard.