I'm thinking and thinking a lot about following thinks, maby you will call me paranoid but i thinking still about it 
1) whats happen if tomorrow all BTC is 1$ worth?
2) what if all countries govoment do crypto currency eg. bitcoins illegal?
3) I can put my bitcoins in a physical product where I can graders me much better against the volatility that is bitcoin exchange rate?
4) The very best way to protect against a hacker attack or against a steal all your money from your wallet ?, are there any ways to choose a safe solution here?
I am a little worried about it and naturally want to protect myself as best as possible.
1) whats happen if tomorrow all BTC is 1$ worth?
2) what if all countries govoment do crypto currency eg. bitcoins illegal?
3) I can put my bitcoins in a physical product where I can graders me much better against the volatility that is bitcoin exchange rate?
4) The very best way to protect against a hacker attack or against a steal all your money from your wallet ?, are there any ways to choose a safe solution here?
I am a little worried about it and naturally want to protect myself as best as possible.
1) People like me will buy a whole lot of bitcoins.
2) Then it will be difficult to buy/sell bitcoins but people will still use it.
3) If you're worried about this then its better you buy something you sure is not as volatile as bitcoins in the first place.
4) Use a cold storage wallet, read up on it here: https://en.bitcoin.it/wiki/Cold_storage
But the bottom line is, no body knows the future, what if WWIII happens in future? We either believe in something or we don't, I believe that bitcoin have a great future and I buy it and use it.