Each user has unique needs, so there is no one size fits all for exchanges. Your bitcoins should not be stored on ANY exchange! Coinbase is the world’s largest Unocoin bitcoin exchange broker, available in the United States, UK, Canada, Singapore, and most of Europe.
SEPA transfer, Interac Online, iDEAL, and many more payment methods depending on location. Coinmama is a bitcoin broker that specializes in selling bitcoins for credit card to nearly anyone in the world. IO allows for the buying of bitcoins for low fees via credit card. Customers can also purchase for free with bank transfers. Wall of Coins is a peer-to-peer Bitcoin exchange that makes it easy to buy and sell bitcoins.
Bit is a global Bitcoin exchange licensed with the New York State Department of Financial Services. It also operates a global OTC trading desk. Changelly is a Bitcoin and altcoin exchange. Users can shift between coins without depositing coins to the exchange. The above exchanges all work in the USA, but the exchanges listed below only work in the USA. Coinhouse, based in Paris, France, lets users buy bitcoin with a 3D secure credit card or debit card, or with Neosurf prepaid cards.
Coinhouse has plans to expand its service to the rest of Europe in early-2016. It offers a wide range of payment methods and has good prices. Bitit, based in Paris, France, lets users buy Bitcoins online with a 3D secure credit card or debit card, and with cash using Neosurf, Flexepin and Cashlib prepaid vouchers. Once you create an account on the exchange you will need to setup 2-factor authentication, verify your bank account, and verify your identity. Once you do all of that you can get started with the exchange. If you can get past understanding how to use Gemini it is a unique exchange. 1-7 days for the bank transfer to complete.
Gemini understands this is frustrating and time consuming. Luckily for US users, you can make instant ACH deposits to Gemini. This means you can buy bitcoins super fast. You will have the bitcoins you bought locked into your account until your ACH deposit clears, but at least this way you were able to buy bitcoin fast and lock in the price you wanted! If you live in Europe, don’t worry! Kraken offers excellent liquidity as its average daily volume is around 10-12 million euros. Kraken is a good option.