Part 1 Advanced The Market Maker’s Exchange Checklist (Liquidity, Latency, and Risk Controls) Market makers and HFT desks: evaluate exchanges on execution quality, liquidity, latency, fees, margin, and security — with a WhiteBIT walkthrough. Open guide A Bitcoin card should do one of two jobs well: pay rewards in BTC from normal spending, or let you spend without dumping the BTC you already hold.
Most crypto cards fail both tests. They list Bitcoin as a supported asset but pair it with hidden fees, limited availability, or a spend model that triggers a conversion every time you swipe. The result is a card that technically supports BTC but works against anyone trying to build or preserve a Bitcoin position.






































