Investment sure got its own risk. Even if you invest in the real world like your country index, there is also risk involved. In fact, mutual funds and etf also have its up and down. Do you feel it is dangerous to invest in those? Similar, invest in btc is extremely risky cause there is scam everywhere in btc world. So you have to choose the right project to invest in. And btc casino is actually a working and profitable model for investment.