What cryptocurrency actually is
Understand what you are buying, in about three minutes, without any prior knowledge.
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Think of it as a public ledger, not a file
There is no coin file sitting on a computer. There is a public list of every transaction ever made, copied onto thousands of computers worldwide. Your "money" is an entry in that list, and the entry is yours because you hold the key that can move it. -
Your wallet does not hold coins — it holds keys
A wallet is software that stores a private key. That key proves an entry on the ledger is yours to spend. Whoever has the key controls the entry. There is no bank to call and no password reset. -
The seed phrase is the master key
When you set up a wallet it shows you 12 or 24 random words. Those words can regenerate every key in that wallet. Anyone who has them controls everything in it, on every device, forever. Write them on paper and keep them where you keep your passport. -
Transactions are irreversible by design
There is no chargeback and no recall. That property is what makes it useful for payments that cannot be clawed back, and it is also the reason a mistake is permanent. Everything else in these tutorials exists to prevent that mistake. -
Bitcoin is one of these. Ether, Litecoin and Solana are others
Each has its own price, block time and address format. All four use the same idea — a ledger and a key — but the asset named on the invoice is the only one that pays it.