Zelcore

Zelcore Academy

Guides, tutorials, and deep dives to help you master crypto self-custody.

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Crypto Basics

Foundational concepts every crypto user should know — wallets, keys, transactions, and blockchains explained.

16 articles

Security

Protect your crypto: seed phrases, phishing, scam patterns, and hardware wallet best practices.

17 articles

DeFi

Decentralized finance explained — staking, lending, swaps, yield, and how to use DeFi safely.

38 articles

NFTs

NFTs, digital collectibles, and on-chain ownership: how they work and how to manage them.

12 articles

How-To Guides

Step-by-step walkthroughs for common crypto tasks — sending, receiving, swapping, and recovering.

21 articles

Coin Guides

Deep dives into individual coins and chains — what they do, how they work, and how to hold them.

51 articles

Learning paths

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bStocks: Tokenized US Stocks in Your Zelcore Wallet

5 parts

Cosmos 2026: The Internet of Appchains

5 parts

Cardano in 2026

4 parts

Latest articles

Ripple RLUSD 24/7 Returns illustrated as a corporate treasury clock beside an RLUSD token

Who Qualifies for Ripple RLUSD 24/7 Returns?

Ripple Treasury has introduced 24/7 Returns for eligible corporate customers, including those with qualifying RLUSD holdings. Holding RLUSD in Zelcore does not, by itself, enroll you in the program.

5 min read
Calendar illustration representing the Glamsterdam Hoodi delay

Ethereum postpones Glamsterdam activation on Hoodi

Ethereum postponed Glamsterdam’s October 26 activation on the Hoodi testnet while developers investigate how a gas proposal could affect existing contracts. ETH holders need take no action; Hoodi testers should revise their plans.

5 min read
X100 governance exploit illustrated by two occupied council seats controlling a treasury vault and liquidity pool

X100 governance takeover: What X holders need to know

Attackers used control of two X100 governance seats to move treasury tokens and liquidity. About 4.85 million USDT had been realized when the October 24 attack was reported as ongoing.

5 min read
JPM Coin Ethereum launch illustrated as an institutional access gate on a public blockchain

JPM Coin on Ethereum: What ETH Holders Need to Know

JPM Coin is now available on Ethereum as well as Base, but only approved institutional clients can hold it. ETH holders do not need to move their assets.

5 min read
Solana Alpenglow activation date illustrated as a relay handoff after 5,000 slots

Solana Alpenglow activation date set for October 21

Solana has scheduled its Alpenglow consensus upgrade for October 21, during epoch 1064. The upgrade targets roughly 150-millisecond finality, but that remains a goal rather than a measured mainnet result.

6 min read
Ledger CryptoBilis implant transmitting a recovery phrase from a hardware wallet

Ledger CryptoBilis implant: What wallet owners need to know

Ledger says an implant in some CryptoBilis-sold devices copied recovery phrases during setup and sent them over a cellular connection. Buyers who used an affected device need a new wallet with a newly generated phrase.

7 min read
Illustration of the Coldcard X phishing link leading away from a trusted verification path to a hardware wallet

Coldcard X phishing link: Verify wallet notices before acting

Coldcard says it is investigating a phishing link posted from its official X account. The incident is a reminder to check wallet security notices through a separate channel before opening links or sharing secrets.

6 min read
France crypto wallet reporting proposal illustrated by a self-custody wallet, a €100,000 threshold, and an unfinished law document

France crypto wallet reporting: what the €100,000 proposal means

French lawmakers have reportedly backed a proposal to report self-custodied crypto holdings above €100,000. Here is who it could affect, what a declaration might cover, and why holders have no new filing duty from the proposal alone.

7 min read
Illustration of the XRP Ledger supply bug as a patched gap in a ledger balance scale

XRP Ledger supply bug: What the patch means for holders

A patched XRP Ledger flaw could have allowed unauthorized XRP to enter the supply. The October 9 disclosure reports no evidence of exploitation on the public network, so holders do not need to move their funds because of this bug.

7 min read
Hardware wallet beside a shipping box illustrating the Ledger CryptoBilis missing funds investigation

Ledger CryptoBilis missing funds: What buyers should know

Ledger is investigating reported wallet drains involving devices bought from CryptoBilis. The cause remains unconfirmed, but recent buyers can take practical steps to check their devices and protect their recovery phrases.

6 min read
XRP Ledger permission delegation shown as a limited access keycard beside a locked account vault

XRP Ledger permission delegation: What wallet users should check

XRP Ledger accounts can now grant another account selected transaction powers without sharing their main key. Here is how delegation works and what self-custody users should review before granting access.

6 min read
Samsung Wallet USDC transfers illustrated as a phone sending USDC across the Solana network, with a key icon representing custody.

Samsung Wallet USDC Transfers on Solana: What Galaxy Users Should Check

Samsung plans to bring USDC transfers on Solana to Samsung Wallet for U.S. Galaxy users. Here is how an onchain transfer works, what the announcement leaves open about custody, and what to verify before sending.

7 min read
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