Buy Bitcoin Worldwide, nor any of its owners, employees or agents, are licensed broker-dealers, investment advisors, or hold any relevant distinction or title with respect to investing. Buy Bitcoin Worldwide does not promote, facilitate or engage in futures, options contracts or any other form of derivatives trading. How to Buy Bitcoin 2020: Complete Guide to The Best Options Jan 31, 2020 · CoinMama. CoinMama is a large bitcoin brokerage that allows users to acquire coins with their debit or credit cards. It is based in Israel and has a global client base. The platform issues small fees for transactions. To make up for this, however, the limits for how many bitcoins a user can buy are much higher in comparison to Coinbase.