Arena Blog

The perpetual is crypto's most-traded derivative — a future that never expires. To stop it drifting from spot, longs and shorts pay each other funding. How it works, who's really on the other side of your leveraged long, and why funding flips whole strategies.

With a CFD you never own the underlying — you make a difference bet with your broker. That's what makes the other side delicate: depending on the model, the broker profits from your loss. How CFDs work, what the EU rules changed, and what really matters.

Warrants and knock-out certificates are huge in German-speaking markets — and no instrument makes the other side this tangible: here the issuer is the seller, the market maker and the one quoting the price. How they work, what they're for, and why the barrier and issuer risk decide everything.

Futures sit underneath a huge share of what moves markets — yet most explanations stop at "a bet on price." What a future really is, what it's for, and the part almost nobody explains: who takes the other side, and how they manage the risk.

CAGR assumptions are smooth. Bitcoin isn't. Anyone planning in a hypothetical world of constant 20% growth is planning for a world that never existed. We've added a Historical Replay mode to the Bitcoin Lifestyle Calculator — pick a start year and we run your strategy through the actual BTC history with Mt.Gox aftermath, COVID crash, FTX collapse, and ATH hype. Here's why that's often brutal and always honest.

Sell, borrow, or borrow-and-buy more? Three strategies with real numbers, stress-tested against the Bitcoin Power Law.