Why does everyone buy exactly the bitcoins?
Because bitcoin was a higher price or you can earn higher, bitcoin is one of the altcoin continuesly increasing not like other altcoin if you can see no movement. Like me i invest my coin in bitcoin because i know i earn what i assume and according to my reasearch and what i read by next year bitcoin was increase in 20%.
You are absolutely right, but that in bitcoin is so good that everyone invests in it. There is no more perfect crypto currency or bitcoin was just the first?