What a crypto exchange actually does
A crypto exchange is a marketplace that matches buyers and sellers of digital assets. At its simplest, it lets you convert ordinary money — rupees, dollars — into crypto and back again, and swap one crypto for another. Behind that simple function sits an order book (a live list of buy and sell offers), a matching engine, and usually a wallet system that holds your coins while they sit on the platform.
Exchanges make money from trading fees, spreads (the small gap between the buy and sell price), withdrawal fees, and sometimes premium features. The largest exchanges process billions of dollars of volume a day and offer hundreds of trading pairs, staking, derivatives, and more.
Centralised vs decentralised exchanges
A centralised exchange (CEX) is run by a company — Binance, Coinbase, and in India CoinDCX and WazirX are examples. You create an account, complete identity verification (KYC), and the company holds your funds and runs the trading engine. CEXes are easy to use, support rupee deposits, and offer customer support, but you are trusting the company with your money. If it is hacked, becomes insolvent, or freezes withdrawals, your funds are at risk. The collapse of FTX in 2022 is the textbook warning.
A decentralised exchange (DEX) — Uniswap, Curve, PancakeSwap — is not a company but a set of smart contracts. You trade directly from your own wallet, you never hand over custody, and there is no sign-up or KYC. DEXes give you self-custody and access to thousands of tokens, but they are harder to use, can't accept rupees directly, and put the full responsibility for security on you. There is no support line if you send funds to the wrong address.
The practical pattern for many people is to use a CEX to convert rupees to crypto, then move assets to a self-custody wallet or a DEX for everything else.
How to choose an exchange
A few factors matter more than the marketing. Security track record: has it been hacked, and how did it handle it? Does it hold reserves transparently? Regulatory standing: is it registered with the relevant authorities in your country? Liquidity: high-volume exchanges give you better prices and let you exit positions quickly. Fees: compare trading, deposit, and withdrawal fees — they add up. Supported assets and rails: can it take rupee deposits via UPI or bank transfer, and does it list the coins you want? Withdrawal freedom: can you actually move your crypto off the platform to your own wallet?
Crypto exchanges in India
India has a domestic exchange market — CoinDCX, CoinSwitch, WazirX, Mudrex, and others — that supports rupee deposits and is registered with India's Financial Intelligence Unit (FIU-IND) under anti-money-laundering rules. Several global exchanges have also registered with the FIU to serve Indian users after a period of being blocked.
Using an Indian exchange has real advantages: rupee on-ramps via UPI and bank transfer, INR customer support, and the exchange handling the mechanics of the 1% TDS that Indian law requires on crypto transfers. The trade-off is the same custody risk as any CEX, and India has seen its own painful example — the 2024 WazirX security breach, in which a large share of user funds was lost, is a reminder that "domestic" does not mean "risk-free."
The India tax mechanics you can't ignore
Every trade on an exchange has tax consequences in India. Gains on crypto (Virtual Digital Assets) are taxed at a flat 30%, with no deduction for expenses except cost of acquisition, and losses cannot be set off against other income or carried forward. A 1% TDS (tax deducted at source) applies on transfers above the threshold, which Indian exchanges deduct automatically; on foreign exchanges and DEXes the responsibility to account for it falls on you. Keep complete records of every transaction — date, value in rupees, and counterparty — because reconstructing them later is painful.