What price will Bitcoin hit on May 21?

Platform comparison

Active sub-markets

Market context

Bitcoin needs to finish above specific strike levels by the settlement cut-off, with the market currently pricing a 0% chance of YES. That makes NO the clear favourite and leaves the upside buckets as the underdog view. The consensus in comparable spot-based price markets has been that Bitcoin often pins near round numbers when momentum stalls, and current third-party forecasts cluster in the high-$70,000s to low-$80,000s rather than a breakout. Robinhood’s BTC market had $78,000 or above at 99¢, while other short-term estimates from Changelly and CryptoNews sat around $81,000 to $85,000, suggesting the crowd has anchored around the high-$70,000s to low-$80,000s as the most plausible band.

The main catalysts are simple: spot follow-through, any move through the 200-day average, and broad crypto risk appetite into the close. 24/7 Wall St. said on 1 May that BTC had been trading around $78,000 and that a clean break above $80,000 would open $85,000 and $88,000, with the 200-day moving average at $82,228 as the key test. CryptoNews reported BTC at $77,957 and said it was bearish, with resistance at $80,886, $82,657 and $83,725. Changelly’s near-dated forecast for 23–24 May was roughly $81,200 to $81,450, while Binance’s model put 21 May at $77,699. That leaves the contrarian angle as a squeeze higher into the settlement window, but the base case remains that Bitcoin stays below the upper strike zone rather than clearing it decisively.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track What price will Bitcoin hit on May 21? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.