Beginner basics

Bitcoin, Ethereum, blockchain, stablecoin and wallet-security fundamentals

Bitcoin

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Beginner basics 2026-10-04 Queenie 9 min 9 reads

#how to buy bitcoin #buy bitcoin #buy BTC #BTC-USDT

How to buy Bitcoin: a complete first-purchase tutorial (2026)

In 2026, the easiest way to understand buying Bitcoin is: register on an exchange → complete identity verification (KYC) → prepare USDT → buy Bitcoin in the BTC/USDT spot market. Bitcoin can be bought in its smallest unit, the satoshi, so you don't need to buy a whole coin. This article covers the 4-step flow, how to choose between market and limit orders, Binance vs OKX, and where to store your BTC afterwards.

Can Bitcoin replace gold? BTC, gold or PAXG: how to choose (2026)

Beginner basics 2026-09-13 Queenie 9 min 7 reads

#bitcoin vs gold #digital gold #can bitcoin replace gold #BTC gold

Can Bitcoin replace gold? BTC, gold or PAXG: how to choose (2026)

In September 2026 the short-term correlation between Bitcoin and gold rose to its highest level since 2020, and the 'digital gold' narrative made a comeback. But that does not mean Bitcoin can replace gold: gold's normal volatility and typical drawdowns are clearly lower than BTC's, so it behaves more like a defensive asset. This article uses one selection table to answer whether you should hold BTC, physical gold or the gold token PAXG, and explains what this 'anti-dollar-debasement' trade really is, plus why the correlation may reverse.

Ethereum

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Blockchain fundamentals

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Stablecoins

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USDT vs USDC: differences, reserves, freeze risk and cash out (2026)

Beginner basics 2026-10-06 Queenie 12 min 4 reads

#USDT vs USDC #difference between USDT and USDC #USDT or USDC #what is USDC

USDT vs USDC: differences, reserves, freeze risk and cash out (2026)

USDT and USDC are both centralized stablecoins pegged to $1, but they are not the same asset: USDT is issued by Tether and its edge is trading liquidity and P2P coverage; USDC is issued by Circle and its edge is reserve disclosure frequency and the regulatory framework. If the goal is to "use" it — trading, moving funds, local off-exchange depth in USDT — look at USDT first; if the goal is to "park" it — valuing reserve disclosure and compliance — compare USDC; if the amount is large enough that you can't absorb a single issuer's risk, don't pick one of the two. This article covers reserves, transparency, freezing, depegging and cash-out paths for both.

USDT sent on the wrong network: can you recover it, and how (2026)

Beginner basics 2026-09-18 Queenie 9 min 6 reads

#USDT wrong network #USDT sent to wrong network #USDT wrong address #what to do if USDT goes to the wrong network

USDT sent on the wrong network: can you recover it, and how (2026)

USDT sent on the wrong network isn't necessarily gone forever, but you shouldn't assume it can always be recovered either: if the funds land in a compatible address whose private key you control (for example, a wrong network between EVM chains), you usually have a chance to recover them yourself; once they reach an exchange or a custodial platform, recovery depends on whether the receiver supports that coin and network and is not guaranteed; into someone else's address, usually all you can do is ask them to send it back. This article covers how the 4 cases are handled, the self-rescue steps, how the costs work, and the most common 'blockchain rollback' scam.

Is USDT safe? Tether reserves, audit and freeze risk (2026)

Beginner basics 2026-09-14 Queenie 14 min 24 reads

#is USDT safe #is Tether safe #can USDT collapse #USDT reserves

Is USDT safe? Tether reserves, audit and freeze risk (2026)

Most people start worrying about USDT when it occurs to them that the USDT in their account might not really be worth that many dollars. As of September 2026, Tether has moved most of its reserves into US Treasuries and completed its first full financial statement audit with KPMG in August 2026; there is no evidence it is in a death spiral like UST in 2022. But that doesn't make USDT a bank deposit. What actually matters is why it holds $1, when it can depeg, and the more realistic traps: address freezes, exchange risk controls and cash-out problems.

Cash out USDT on Binance/OKX P2P: process and frozen accounts (2026)

Beginner basics 2026-09-13 Queenie 12 min 82 reads

#cash out USDT #USDT to local currency #P2P selling #sell USDT on Binance

Cash out USDT on Binance/OKX P2P: process and frozen accounts (2026)

Cashing out USDT into local currency means selling it in an exchange's P2P market: the buyer pays your verified account (bank account or payment app) according to the order, and you confirm the money really arrived and check who paid before releasing the USDT. This article covers the full P2P selling process on Binance and OKX, how to choose a counterparty, and the causes and handling of the three kinds of account restriction: bank risk controls, anti-fraud payment blocks and court or law-enforcement freezes.

USDT transfer: TRC20, ERC20 or BEP20 — which network to use (2026)

Beginner basics 2026-09-02 Queenie 9 min 14 reads

#USDT transfer #TRC20 #ERC20 #BEP20

USDT transfer: TRC20, ERC20 or BEP20 — which network to use (2026)

When you transfer USDT in 2026, start with the network the receiver supports: for a deposit to Binance or OKX use the network shown on their deposit page, for a cold wallet you hold long term choose TRC20 (the lowest fee), and for Ethereum DeFi choose ERC20. Picking the wrong network is the most common accident, though it can often be recovered; the more hidden trap is having USDT you can't send at all, because the fee must be paid in that network's native coin. This article covers the fee comparison across the three main networks, how to choose, and what to do when you picked wrong.

Crypto ecosystem

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Wallets & security

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Others

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How to choose a cold wallet: Ledger, Trezor, OneKey or Tangem (2026)

Beginner basics 2026-10-07 Queenie 11 min 2 reads

#how to choose a cold wallet #hardware wallet recommendations #cold wallet #hardware wallet

How to choose a cold wallet: Ledger, Trezor, OneKey or Tangem (2026)

In 2026, choosing a cold wallet comes down to four things: the size of your holdings, whether open-source firmware matters to you, whether you need to verify transactions on the device itself, and which backup method you're willing to use. The four options: Ledger has the most mature ecosystem and multi-chain support, Trezor is open and transparent, OneKey offers open firmware plus a large screen and Air-Gap, and Tangem is the simplest card-based option. This article breaks the choice down by security model and five usage scenarios, without pretending there is one 'absolutely safest' answer.

Where to keep crypto after buying: exchange, hot or cold wallet (2026)

Beginner basics 2026-09-10 Queenie 13 min 3 reads

#which wallet for beginners #cold wallet vs hot wallet #USDT security #wallets and security

Where to keep crypto after buying: exchange, hot or cold wallet (2026)

After buying your first Bitcoin or USDT, should it stay on the exchange, go into a hot wallet, or a cold wallet? This article starts from custody, how often you trade, how much loss you can absorb and how your wallet recovers, to help beginners decide which setup fits — and includes a real test: withdrawing 5 USDT from Binance to a Web3 Wallet.