Of course, the transaction, the easiest way to get access to Bitcoin is the transaction, bitcoin price fluctuations, every day a large number of people to sell or buy, of course, you have to know the risk of investment. good luck. 
Yes transaction is the best source to get a bitcoin, be the active member of the forum so to have information about buying and selling, if you desire to buy a bitcoin, be wise and be keen during transferring of money and first check it out whether you got your bitcoin or not, and further invest your bitcoin because its price is getting high due to which the output will be high too