First, you have to find the right user to trade, there are many liar, protect your wallet! Be cautious, do not set sales goals greedily, get used to being satisfied as long as they are good, and do not try to sell at an unreasonable price.
If you are new to this market, why do not we go through trading floors to make trading safer? Vigilance is a must for this market. But in order to be able to trade and make a profit, you have to spend a little money first. this is inevitable.