How cryptocurrency works
Every holder has a pair of keys. The public one works like an account number and can be shared freely; the private one signs transactions and never leaves the owner’s device. Sending coins means signing a message that says where the value goes.
That message reaches a network of computers, which check the signature and the balance. Once enough of them agree, the transaction lands in a block and the ledger updates everywhere at once. This takes seconds on some networks and up to an hour on others.
Nobody can reverse it afterwards. That single property explains most of what follows: why crypto payments have no chargebacks, why sending to a wrong address is unrecoverable, and why merchants who used to lose money on disputes find the model attractive.
What makes one cryptocurrency different from another
Roughly four things.
Speed and cost
A transfer on TRON confirms in three to ten seconds for around a dollar. The same transfer on Ethereum takes one to three minutes and costs more, sometimes far more when the network is busy.
Price behaviour
Bitcoin moves. Stablecoins do not, by design: each one is meant to hold a fixed value, usually one US dollar. As of 2026 stablecoins carry roughly 82 percent of the volume that passes through crypto payment gateways, according to CoinLaw, and the reason is exactly this.
What the network is for
Some chains exist to move value and nothing else. Others run programmable contracts, which is where lending, exchanges and token issuance live.
Who actually holds it
A coin your customers do not own is a coin you will never be paid in, however good its technology.
Cryptocurrency in a payment flow
A customer paying a business in crypto does not send coins to that business directly. The payment gateway generates a fresh address for the order, watches the network for the incoming transfer, confirms it, and credits the merchant. The merchant can keep the crypto or have it converted at the moment it arrives.
Adoption is no longer marginal. Around 559 million people worldwide held some cryptocurrency in 2026, roughly 9.9 percent of internet users, and more than 25 million merchants accept at least one coin.