I have read and heard that one can earn and make good money with trading bitcoins.I also want to give it a shot.Everyone says the basic rule of trading is buy low and sell high but I am confused because which ever exchange I try,the buy rate is always higher than sell rate.How can one profit if sell rate is less than buy rate.If I buy at $390, the sell rate is $380
yes of course price changes, pumps and dumps like usual, and you shouldn't be afraid of that because it is very normal for bitcoin, if you bought for 390$ for example, don't sell them for sell that 430$ or you won't get profit, don't sell when cheap