# Key takeaways

* **Crypto = digital, programmable money.** It runs on open networks (blockchains), not on a bank’s private ledger.
* **Security comes from cryptography + incentives.** Networks use economic rewards and penalties to keep participants honest.
* **You can do more than invest.** Crypto enables payments, savings, remittances, NFTs, DeFi apps, voting, and more.
* **Wallets matter.** Choosing between custodial vs. non‑custodial—and hot vs. cold—affects convenience and control.
* **Start small and stay safe.** Learn the basics, use reputable platforms, and protect your recovery phrases.


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