What price will Bitcoin hit on May 21?

Platform comparison

Active sub-markets

Market context

Bitcoin was trading around the high-$77,000s to $78,000 late on 21 May, with market data and prediction listings clustered just below the round $78,000 mark. That makes the current crowd-implied 0% chance for a higher strike an extreme reading rather than a neutral one: the price only needs a modest intraday rally to move into the next band, while a flat or weak close leaves the lower outcomes intact. Comparable forecasts from crypto analysis sites are split between a short-term range trade and a push towards $81,000-$85,000, which underlines how sensitive this market is to the final hours of trading rather than to a structural trend change.

The main catalysts are simple: whether Bitcoin can hold above immediate support and whether any late macro or crypto-specific headlines shift risk sentiment before settlement. Robinhood’s prediction market was pricing $78,000 or above at 99¢, while outside forecasts from Binance, Changelly and 24/7 Wall St all centred on roughly $78,000-$85,000 as the near-term range, with $80,000 and the 200-day moving average cited as key resistance. Traders should watch for any move through that level, plus US macro headlines, ETF flow updates and exchange-driven volatility, because a late break either way would matter far more than earlier noise.

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Methodology

This page reviews What price will Bitcoin hit on May 21? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.