Hello,

I am new to bitcoin, I have managed to set up a wallet on blockchain and on coinbase.
I am also aware of bitaddress and how to upload my wallet to blockchain.

That said, can anyone explain to me the cheapest method of buying BTC?
Also, what is purpose of buying / saving BTC?

How do people go about trading BTC?

Should I be using  an online BTC wallet when buying & storing BTC and what one is best if so?
 
If anyone could give me an inspiring newbies crash course as to why i should be buying BTC and uses / purposes of it along with strategy and practical educational info I would very much appreciate it.

Thanks,
Hero