if you want to know about trade, then I will say that trade is simple buying with lower price and selling them at higher price. and for remaining details you can see the detailed tutorials available in various articles available on google.
Ofcourse. Trading is risky if your knowledge abou it are very little or lack of knowledge. Even if you have lot of money or investment as long as you didn't know how trading is happen and what are the different strategies. You will fall and suddenlt your big amount of money will all get lost and you will fall down because of lack of knowledge. Bitcoin trading is a type of business people use to earn or grow their investment. You must know that rules and strategies to have a good earnings.
The method is easy just buy bitcoins at a low price and sell it for a high price. But for this, you must have enough knowledge. You must know where to buy and where to sell. In Trading market skills is important if you are poor in analysing market price then better don't enter this field it will be risky.