I still dont get whats the point of having a transparent blockchain. Why the fuck people has to be able to trace the history of my Bitcoins and know my total amount of BTC?
There is a point in having a transparent blockchain, IMO. But there are other coins that are trying to solve the anonymity problem with the transparent blockchain. Some of the bigger ones are Darkcoin (now called DASH, I think) and Monero (XMR). Another I've heard people talk about is Shadow Cash (SDC).
Disclaimer: I am in no way endorsing the above altcoins. They may be scams or pump and dumps or whatever else, buy at your own risk. However, just for the example in the OP, say a 5 btc vacation, any of the coins above should have a big enough marketcap to do that no problem.