Use this if you want bitcoin-only investing or a brokerage-style bonus without a giant comparison.
River says it is a bitcoin-only brokerage, publishes monthly Proof of Reserves, keeps client bitcoin deposits in cold storage, and pays up to $100 in bitcoin across staged referral buy thresholds.
Webull says Webull Financial is a FINRA and SIPC member, and its referral bonus unlocks after a qualifying account open and transaction. Use it for brokerage-first readers who expect market tools, not just crypto onboarding.
Coinbase says both people can earn $5 in BTC after the new user buys crypto, and it remains the cleanest first-click exchange on Nummix for simple onboarding and a straightforward first buy.
River stays first when the reader wants recurring buys, a more deliberate reserve posture, and less temptation to turn investing into day-to-day trading.
Webull is the second click when the reader wants stocks and crypto in the same dashboard, simpler funding, or a brokerage-style account instead of a bitcoin-first posture.
Coinbase works best when the deciding factor is broad brand recognition, a faster familiar exchange setup, or the easiest mainstream trust language after the core long-horizon case is clear.