Bitcoin sports betting
Bitcoin sports betting on OVERDOG runs on a single rail. You send BTC on the Bitcoin network; it converts to Polymarket's US-dollar stable unit, held one-to-one against the dollar; you trade sports markets at prices other traders set; and you withdraw as USDC on Polygon, USDC on Solana or USDT on Tron.
Bitcoin is the only asset here with a deposit address of its own and no second way in — the bridge issues four, and BTC reaches exactly one of them. It is also a one-way trip: no Bitcoin withdrawal destination exists, so your bitcoin exposure ends at the deposit conversion and does not come back. Bitcoin in, stablecoin out.
OVERDOG is an access layer to the Polymarket exchange, not a bookmaker — it sets no lines and takes no side of your bet. Betting is entertainment, not income; stake only what you can afford to lose.
How to use Bitcoin for sports betting
Send BTC to your Bitcoin deposit address, wait for the network to confirm it, and the balance appears as the dollar unit every market is priced in. Then buy shares in an outcome. Each share redeems for $1 if that outcome happens and nothing if it does not, so the price reads directly as the market's implied probability — you buy from another trader at a price the order book sets, not a line a book wrote for you.
Nothing forces you to hold to settlement. While a market is still trading you can sell shares back into the order book at whatever other traders are bidding — the exchange equivalent of a cash-out, subject to a resting bid being there. The difference from a sportsbook's cash-out is authorship: a book quotes an exit price it can pull at will, while here the price is the market's own bid.
The cost is a flat 1% OVERDOG fee plus Polymarket's own fees, disclosed together before you commit; nothing is shaded into the quote, because the quote comes from traders. The Bitcoin network's transaction fee on the way in goes to miners.
The Bitcoin deposit route
One row in the deposit registry covers bitcoin: BTC on Bitcoin. It is a native-coin route — what you send is bitcoin itself, on its own ledger, not a token issued on someone else's chain. That single row is the practical argument for it: picking the wrong network for the right ticker is how crypto deposits are most often lost, and this route offers no wrong network to pick.
One asset, one network, one address family
The bridge issues four deposit addresses, one per address family: Ethereum and the EVM chains, Solana, Bitcoin, and Tron. The sheet documents ether, USDT, USDC and BNB on the EVM address; SOL and USDC on the Solana one; USDT on Tron. Those lists are what we render, not the limit of what the bridge credits. The Bitcoin address is the exception: BTC is what it takes, and BTC has no second way in.
Send only BTC, and only on Bitcoin
The deposit screen is blunt about it: send only the asset shown, on the network shown, because anything else is lost. Bitcoin makes that easy to follow — one network on the row, one address to copy — and the four family addresses are not interchangeable. The minimum comes from the bridge at the time you deposit. A transfer credits once the network has confirmed it: a matter of blocks, not an instant.
Wrapped bitcoin on the bridge, and on the deposit sheet
Bitcoin, like ether, also exists as wrapped tokens the bridge accepts and our deposit sheet does not render. WBTC is the best known — an ERC-20 backed one-for-one by bitcoin held with a custodian — and it sits on the bridge's accepted list while carrying no row on our sheet, so it is not a route we offer, document or quote a minimum for. Ether has the same shape on Polygon, where the bridge takes WETH rather than ETH.
The board a Bitcoin deposit reaches
The funding asset decides how money arrives, never what you may trade. A Bitcoin-funded balance reaches the same board as every other, and that board splits two ways: single fixtures, and season-long pools.
Match markets, fixture by fixture
Soccer runs deepest. The Premier League brings Manchester City, Arsenal and Liverpool; MLS lists Inter Miami CF, Orlando City SC and Toronto FC; Liga MX and Brazil's Serie A run their own weeks. The North American majors trade fixture by fixture across the NFL, NBA, MLB — the Baltimore Orioles and Philadelphia Phillies among them — and the NHL. MMA carries UFC cards, tennis runs the ATP and WTA tours, and esports lists Counter-Strike 2, League of Legends, Valorant and Dota 2.
Futures pools: league champions and season awards
Alongside the fixtures sit season-long pools — champion markets for the Premier League, LaLiga, Serie A and the Champions League, and awards such as the Ballon d'Or. These suit an exchange better than a slip: a future bought early can be sold back as the field narrows rather than sitting frozen until the season ends, and no house is watching to restrict the account that bought it first.
Withdrawing a Bitcoin-funded balance
There is no Bitcoin withdrawal route. The registry holds three destinations and none is Bitcoin, so a balance funded with bitcoin leaves as a dollar-pegged stablecoin — worth knowing before you deposit rather than after.
Polygon USDC, Solana USDC and Tron USDT
Three destinations, and that is the complete list: USDC on Polygon, USDC on Solana, USDT on Tron. Nothing converts on the way out, because the balance is already dollar-denominated. Each carries its own minimum, always shown, and a network cost quoted before you confirm whenever the bridge answers; that cost goes to the chain, and OVERDOG takes nothing. Each has its own explorer receipt, on Polygonscan, Solscan or Tronscan.
The address formats a withdrawal accepts
You paste an address for the destination you chose and it is decoded before anything moves, not merely pattern-matched. An EVM address is twenty bytes of hex; a Tron address is base58 whose checksum has to verify; a Solana address decodes to a thirty-two-byte key. Those three are the only formats the withdrawal path knows, and there is no Bitcoin one.
Cost basis on both legs: bitcoin in, stablecoin out
Two legs, two different assets, and the first is the one bettors miss. Converting bitcoin into the dollar unit at deposit is a disposal of that bitcoin: the IRS treats virtual currency as property, so exchanging it for other property means recognising a gain or loss against your basis. Winnings are then ordinary income at the value received, and the USDC or USDT you withdraw carries a basis of its own. This is not tax advice; treatment varies by jurisdiction and a qualified professional is the right source.
Bitcoin against the other deposit assets
Every deposit asset lands in the same dollar unit, so the choice shapes only the way in and the way out. A deposit in ETH picks between Ethereum, Arbitrum, Base and Optimism; bitcoin has one network and no wrong one.
One network in, where ether has four
Bitcoin has a single deposit pair. Ether has four networks — Ethereum, Arbitrum, Base and Optimism — because ether is the native gas asset on each. USDT reaches us across two address families and USDC across two as well, while SOL and BNB each arrive on one chain that also carries stablecoins. Bitcoin alone has no alternative route and no cheaper chain to start from.
Funding in bitcoin or in a dollar-pegged asset
Funding in bitcoin spends the bitcoin: you stop holding it, the position you open tracks the market you bought rather than bitcoin's price, and the balance you withdraw is a stablecoin. Only two assets come back as what they went in as — USDC round-trips on Polygon and on Solana, USDT on Tron, deposit and withdrawal pinned to the same contract each time. Bitcoin, ether, SOL and BNB are the deposit-only four. Bitcoin is the right choice when bitcoin is what you have; it is a sale, not a shortcut.
Betting Polymarket markets with a Bitcoin deposit
Orders go to Polymarket's own order book; what OVERDOG adds is a betting terminal over it and the crypto funding paths into it, never lines of its own.
Prices come from traders bidding against each other, so nothing is shaded toward a house. That is what no vig describes: how a price is formed, never a claim that a bet will win. With no house on the other side there is no book to protect, so betting well never gets an account limited.
Settlement runs on-chain: winning shares redeem through Polymarket on Polygon at $1 each, publicly verifiable rather than a line in a private ledger. No identity check is required to deposit bitcoin, bet or withdraw, and the wallet is yours to export whenever you like — we can't freeze you. That is no-KYC rather than anonymity: an account exists, and settlement is public by design.