Unlike ordinary money, cryptocurrency prices are highly volatile, so the rate may fluctuate. It may happen that the altcoin exchange rate which you see before the transaction is different (high or low) after transaction gets completed. In that case, the exchanged digital currency quantity which you receive may differ from what you see during the comparison.
Bitfinex is a full-featured spot trading platform for major digital assets & cryptocurrencies, including Bitcoin, Ethereum, EOS, Litecoin, Ripple, NEO, Monero and many more. Bitfinex offers leveraged margin trading through a peer-to-peer funding market, allowing users to securely trade with up to 3.3x leverage. We also boast a suite of order types to help traders take advantage of every situation.

ErisX is a CFTC-regulated derivatives exchange and clearing organization that will offer digital asset futures and spot contracts on one platform. By integrating digital asset products and technology into reliable, compliant, and robust capital markets workflows, ErisX will help to make digital currency trading even more accessible to investors and traders, like you.
Risk Disclosure: Trading in financial instruments and/or cryptocurrencies involves high risks including the risk of losing some, or all, of your investment amount, and may not be suitable for all investors. Prices of cryptocurrencies are extremely volatile and may be affected by external factors such as financial, regulatory or political events. Trading on margin increases the financial risks.
Ethereum: Is probably the third most important coin [here in 2018, I’d argue that it is the second most important after Bitcoin]. Ethereum doesn’t have the longevity at the top like Litecoin, but it has some unique features and a market cap that make it a real contender. Most ICOs (Initial Coin Offerings) use Ethereum. It has a less intimidating cost that Bitcoin and has the second highest market cap. On that note, Ethereum classic is also notable. Ethereum is a spin-off (aka “hard fork”) from what isn’t today called Ethereum classic (like how our next up coin, Bitcoin cash, is a spin-off of Bitcoin.) NOTE: Ethereum is a fork of another relevant coin called Ethereum Classic.
Within a cryptocurrency network, only miners can confirm transactions by solving a cryptographic puzzle. They take transactions, mark them as legitimate and spread them across the network. Afterwards, every node of the network adds it to its database. Once the transaction is confirmed it becomes unforgeable and irreversible and a miner receives a reward, plus the transaction fees.
Hello, I live in the US. I have a lot of BTC in JAXX and I want to sell it and transfer the money into my bank account. Can I transfer the BTC to Binance or Changelly and then sell the BTC for USD and then transfer the USD from Binance or Changelly to my bank account? I want to use an exchange that has very little registration work needed and is simple to use. Thank you so much!

But while cryptocurrencies are more used for payment, its use as a means of speculation and a store of value dwarfs the payment aspects. Cryptocurrencies gave birth to an incredibly dynamic, fast-growing market for investors and speculators. Exchanges like Okcoin, poloniex or shapeshift enables the trade of hundreds of cryptocurrencies. Their daily trade volume exceeds that of major European stock exchanges.
The term altcoin has various similar definitions. Stephanie Yang of The Wall Street Journal defined altcoins as "alternative digital currencies,"[20] while Paul Vigna, also of The Wall Street Journal, described altcoins as alternative versions of bitcoin.[21] Aaron Hankins of the MarketWatch refers to any cryptocurrencies other than bitcoin as altcoins.[22]