Hellow
Im new to this cryptocurrency field and I just started this account. my friend told me to open this account for study about crypto.
but I have no Idea what to do here. how I start to learn this...?
If you mean by trading without any knowledge in cryptocurrency then treat it like a merchandise just like what you know in physical markets except that you're doing it in digital. "Buy low, sell high" - an easy to learn concept but hard to master. There are a lot of exchanges in the internet where you can start trading and so far I suggest using Etherdelta and Bittrex. You can check around the trading discussion to learn more about trading. Trading is quite complex because of the price fluctuation in the market and I suggest being active in the price chart you're gonna trade especially Bitcoin, so you can raise your capital without being burden in too much losses.
What is bounty and how I can start it , what is Airdrop.?
Bounty campaign is one of the ways to earn various coins in here depending on the coin being promoted around the forum. Bounties aren't focused only in signature campaigns in the forum, it is also done in popular social sites such as Facebook, Twitter, Telegram and any other sites that can be used to publicize the coin being promoted. Airdrop is simply a giveaway of coins and you just need to enter the required information then wait for a certain day before you receive the coins. I don't join too much in airdrops because I personally think that it is not worth my time, but the decision is still up to you.