in we invest in bitcoin definitely have a very important risk for security, because in the bitcoin world there is no such thing as a person who bertungung jawap if something happens to us, then in terms of security we must pay attention to itself as we keep in a safe wallet, do not scratching the wallet carelessly the web, do not give our private key to someone else. This is very important in bitcoin investment, but why do more people invest more in bitcoin? .. because more profit than investing elsewhere, even we can profit 2 times of capital