With investment money in bitcoin is risky, certainly bitcoin we drop by up to 100% because even lost stolen hackers, there is no guarantee bitcoin system of safe from thieves.
Can't your fiat money be stolen ? Or your investments in stocks/bonds are coming with zero risk for your money ? Bitcoin is just another type of investment so it also comes with all usual risks typically an investment will be having.
100% drop is only possible with lost bitcoins, value will never drop that much. But, honestly compared to any other investment types like bank deposits/real estate opportunities, I believe bitcoin investment is good as it is fetching high returns in quick times and hence I am ready to bear the risks it is having.