What Are Crypto Perpetual Futures (And How I Made $8,400 Trading Them)
Alexa Velin
January 18, 2026
Root access to modern finance.
Root access to modern finance.
Welcome to our daily blog, your daily dose of inspiration, information about cryptocurrency and financing and everything in-between. Shell & Coin is proudly sponsored by Royal Pheromones.
The Graph (GRT) is the indexing protocol powering most of DeFi. Learn how subgraphs, indexers, curators, and GRT tokenomics actually work.
Stellar (XLM) is the payments blockchain powering cross-border remittances, USDC, and the DTCC’s 2027 tokenized securities platform. Here’s how it works.
A spot Bitcoin ETF holds real BTC and trades on stock exchanges. Here’s how it works, what it costs, the top funds to know, and who should actually buy one.
Dollar cost averaging (DCA) in crypto means buying fixed amounts at regular intervals. Learn how it works, when it beats lump sum, and how to start today.
Learn how Ethereum staking works, the 4 methods to earn ETH rewards, current APY rates (3-5%), real risks, and IRS tax rules. No 32 ETH needed for most.
Learn how Worldcoin (WLD) uses iris scans to verify human identity, what World ID enables, how World Chain works, and the privacy risks you need to know.
Learn how to set up Samba on Linux step by step — smb.conf, user setup, firewall rules, SELinux context, and connecting Windows and Linux clients.
Learn to use Btrfs on Linux — create subvolumes, take snapshots, enable zstd compression, and run scrubs. Practical commands for every Linux admin.
Learn how to configure AppArmor on Linux—check status, create custom profiles, switch between modes, and harden your system with real command examples.
Learn how to configure SELinux on Linux: check and switch modes, manage file contexts, troubleshoot denials, and use booleans to harden your servers.
Learn how to set a static IP in Linux using Netplan, nmcli, or /etc/network/interfaces — with working examples for Ubuntu, RHEL, Rocky, and Debian.
Learn how to use iotop in Linux to monitor disk I/O per process in real time. Install, read output, use key flags, and diagnose disk bottlenecks fast.
Learn how to use the Linux diff command to compare files and configs. Covers output reading, key flags, directory comparison, and the diff+patch workflow.
Margin trading is like alcohol – a little bit can make the party more fun, too much will ruin your life, and some people shouldn’t touch it at all. I learned this after getting margin called three times, losing $50,000, and nearly destroying my marriage. But then I learned to
Learn how to check listening ports in Linux using ss, netstat, and lsof. Master port monitoring for security and troubleshooting in 2025.
Master the top command in Linux with real-world examples for monitoring CPU, memory, and processes. Complete guide with practical troubleshooting techniques for 2025.
Learn how to set environment variables in Linux permanently and temporarily. Master export, PATH, .bashrc, and security best practices with real examples.
I’ve lost count of how many times the sort command has pulled me out of a tight spot. Whether I’m analyzing server logs, cleaning up configuration files, or just trying to make sense of a CSV export, sort is one of those commands that seems simple until you need it
Learn how to install Apache on Linux step by step. Covers Ubuntu, Debian, and RHEL/Rocky Linux with virtual hosts, firewall config, and security hardening.
Learn how to use the SCP command in Linux to securely transfer files between systems. Includes syntax, real-world examples, troubleshooting tips, and security best practices.
Learn how to schedule cron jobs in Linux with this complete guide. Includes syntax examples, common mistakes to avoid, troubleshooting tips, and real-world automation patterns.
Learn the Linux which command to find executable locations in PATH. Discover when to use which vs type vs whereis, troubleshoot conflicts with -a, and master command resolution.
Learn DeFi yield farming from someone who lost $100k before figuring it out. Real strategies for 30-40% APY, risk management, and the protocols that actually work in 2025.
Learn how to check systemd service status in Linux using systemctl commands. Master troubleshooting failed services, monitoring, and managing system services effectively.
Learn how to use systemctl to manage Linux services. Master start, stop, enable, disable, and troubleshooting commands with real-world examples.
Learn SSH tunneling in Linux with real command examples. Master local, remote, and dynamic port forwarding to secure your connections like a pro.
Add a user in Linux the right way. This guide covers useradd, adduser, passwd, usermod, userdel, and granting sudo access with real examples.
Setting up a WireGuard VPN Server on Ubuntu: A Comprehensive Guide In this guide, we’ll walk you through setting up a WireGuard VPN server on Ubuntu. WireGuard is a modern, fast, and secure VPN protocol that is easy to configure and use. This tutorial is designed for beginners, so no
Learn how to check network speed in Linux using ethtool, speedtest-cli, and iperf3. Master bandwidth monitoring with real-world examples for 2025.
Okay, let’s settle this once and for all. I’ve been both a day trader and a swing trader, and I’m about to save you years of expensive trial and error. Everyone wants to know whether they should be glued to their screens all day scalping for pennies or holding positions
Install Redis on Linux the right way — step-by-step commands for Ubuntu, Debian, and RHEL, plus security hardening and kernel tuning every sysadmin needs.
Master the Linux find command with practical examples and real-world use cases. Learn to search files by name, size, permissions, and time. Complete 2025 guide with advanced techniques.
Learn how much to save in your emergency fund with this complete guide. Expert advice on building 3-6 months expenses, where to keep it, and avoiding common mistakes.
Master Linux file permissions with this complete guide. Learn to read rwx notation, avoid chmod 777 mistakes, and secure your system properly.
I’ve blown up accounts at seven different brokers. Not because I’m proud of it, but because I’m apparently a masochist who needs to test every platform personally before believing the reviews. Over the past six years, I’ve traded options on TD Ameritrade, E*TRADE, Robinhood, Tastyworks, Interactive Brokers, Webull, and Fidelity.
Master the nohup command in Linux. Learn syntax, real-world examples, output redirection, and how nohup compares to screen, tmux, and disown for background processes.
What is Sei Network (SEI) crypto? Learn how this L1 blockchain delivers 12,500 TPS, sub-400ms finality, and DeFi-native speed using Twin-Turbo consensus.
Jupiter (JUP) is Solana’s dominant DEX aggregator with $1T+ in volume and 95% market share. Here’s how it works, what JUP does, and if it’s worth your attention.
Injective (INJ) is a Layer 1 blockchain built from scratch for DeFi finance. Learn how its MEV-resistant order book, burn tokenomics, and RWA markets work.
What is Shiba Inu (SHIB)? Learn how this Ethereum meme coin evolved into a DeFi ecosystem with Shibarium L2, ShibaSwap DEX, and a deflationary burn model.
Zero knowledge proofs let you verify truth without revealing data. Here’s how ZK tech powers Ethereum L2 scaling, DeFi privacy, and the future of crypto in 2026.
Set up MetaMask wallet in minutes. Learn how to install it, secure your seed phrase, add custom networks, and avoid the scams that steal from 500 users daily.
What is Hedera HBAR crypto? Learn how hashgraph consensus, the Governing Council, and enterprise use cases make HBAR different from every other blockchain.
Hot wallet vs cold wallet explained: the key differences, real security risks, and which crypto storage strategy makes sense for your holdings.
Aptos is a Layer-1 blockchain built by ex-Meta engineers using the Move language. Learn how APT, Block-STM, and real-world asset adoption make it unique.
The biggest onchain exchange
Centralized-exchange speed, but your funds stay in your own wallet. No account, no KYC.
Try Hyperliquid