Bitcoin is called first decentralized cryptocurrency. It provides safe peer-to-peer transactions without any intermediary. These transactions are verified by network nodes and recorded in a public ledger. Bitcoin price has been increased in many folds in recent years. Many exchanges (Bitmex, Bitfinex) offer margin trading facility in bitcoin.
All other cryptocurrencies (other than Bitcoin) called Altcoin (Alternative coin). These AltCoins are also based on same blockchain technology. Many AltCoins have tried to improve the aspects to achieve their different goals. AltCoin trading is very popular among the traders. Bittrex, Poloniex, Bitfinex are among the best exchanges for AltCoin trading.
ICO (Initial Coin Offering)
The first token sale is generally called as Initial Coin Offering (ICO). The coin in an ICO is a symbol of ownership interest or a digital stock certificate. ICO coin sale of more than $2 billion had been conducted during this year. Investing in good ICO can be very profitable but need lot of research & investigation.