Multi-currency support – Can it handle Bitcoin, Ethereum, stablecoins (USDT/USDC), and not just one or two coins?

Settlement options – Do you get paid in crypto, fiat, or can you choose? This matters a lot for accounting and volatility exposure.

Security & compliance – Look for encryption, fraud detection, and whether they support KYC/AML if you need it for your jurisdiction.

Integration ease – API/SDK availability for your existing e-commerce or fintech stack matters more than people expect upfront.

Transaction speed & fees – Some gateways route through multiple confirmations, which slows things down; check the fee structure too.

For a sense of what a full-scope build typically includes, this overview of crypto payment gateway development covers most of these considerations — useful as a reference point when comparing vendors.