All forms of investment involve a form of risk, No risk No gain, Engaging in Bitcoin has a level of risk, but worth the risk, as it is not a bubble,ponzi scheme, that can colapse in a flash, Bitcoin gives a high level of return compare to all other form of investment.
The risk involved with Bitcoin is still within tolerable limits. But some of the users go one step further and invest their savings in ICOs. There can be no investment more riskier than this, given the fact that more than 95% of the ICOs end up as failures. For now, I am sticking with Bitcoins. None of the other cryptocurrencies seems to have a long-term future.