How to buy bitcoin?
There are several ways to purchase bitcoin. The first thing you'll need to do is to create an account in an exchange like Kraken.com or Coinbase.com. Then, you can buy Bitcoin via: credit card, cash, wiretransfer, Bitcoin ATM or PayPal. There are pros and cons to each of them. Eg. Bitcoin ATM, Credit Card or PayPal are fairly easy ways to buy Bitcoin. However, they come with very high exchange fees.
How to trade bitcoin?
To start trading your Bitcoins, you'll need to establish a strategy. Majority of professionals recommend to never trade with more than you can live with. You'll be able to trade different altcoins once you have acquired Bitcoin. Afterwards, you can also trade this other coins against other coins. Eg. You'll be able to trade 1BTC or Satoshis (1 Satoshi= 0.00000001 BTC) for other coins. Some popular altcoins are: Ethereum (ETH), Dash (DASH) and Ripple (XRP) but there are more than 4500 cryptocurrencies.
How to use bitcoin?
Bitcoin can be used for several things once you have a wallet. Most common notion for use of Bitcoin is as Store of Value (equivalent to what Gold is to Fiat). However, there are several retail stores that accept Bitcoin as a means of payment- from major retailers like Microsoft and Starbucks to every other category like Gardening, Travel, Beauty and Health and many more.
How to sell bitcoin?
Once you have created your Exchange account, you'll be able to both buy AND sell Bitcoin and other cryptocurrencies. Exchanges will offer different buy/sell pairs for your different FIAT currencies or other crypto currencies. Most common being BTC/USD as well as ETH/USD.