Polymarket, the original cryptocurrency prediction market, has started supporting instant Bitcoin deposits via Lightning network. The feature uses infrastructure from sparka Bitcoin protocol designed for payments and stablecoins.
In a post on X, Spark He said Users can deposit BTC into the platform more quickly and privately than the old method offered.
This step extends to a financing push He started In October 2025, when Polymarket ran record bitcoin deposits on-chain. These deposits incur a wait: Most on-chain Bitcoin transactions need three to six confirmations, and a 10- to 60-minute window, before the exchange credits the account.
The cross-chain path carries a higher minimum deposit, which reflects bridging costs. For a trader who wants to take a position in a live market, delays and fees represent a cost.
Lightning and spark close the gap. Spark verifies the authenticity of a Bitcoin transaction the moment it is broadcast, checking for the risk of double spending, adequacy of fees, and signals for redemption with a fee.
The protocol makes a deposit in less than a second and absorbs confirmation risk, a design that Spark markets as zero.
Polymarket does not have to manage confirmation limits or operate its own limits Lightning Contract. One Spark SDK handles on-chain rails, Lightning, and stablecoins.
Spark holds deposits in self-custody. Each wallet is linked to the user’s private keys, so it is the protocol, not Polymarket, that carries the operational burden, and users retain control of the funds until the trade takes place.
Spark counts wallet providers like Breez,
Polymarket has flourished over the years
Timing is important for a growth stage company.
Founded in 2020, Polymarket rose to prominence during the 2024 US presidential election and added Chainlink prophecies, profit markets, and new competition with… Organized competitor everything.
Faster and cheaper funding lowers the barrier for Bitcoin holders who make up a large percentage of the cryptocurrency crowd, and gives Polymarket a new answer to a competitor that is squeezing it in terms of volume.
