"Hacking and scams remain the top risk for Bitcoin holders. Exchanges that shut down or passwords stolen from devices can easily wipe out a persons bitcoins. Moreover, governments and central banks from various countries are starting to impose limitations on the use of cryptocurrencies.
Digital coins clearly threaten the political and economic establishment, and the regulatory environment can quickly change with the stroke of a legislative pen. Banks and governments typically use familiar language in the media, such as the need to protect consumers from new risks.
We are hearing familiar talking points from politicians who are getting pressured from the banking lobby. It seems that the root cause of the status quos actions in 2017 is to protect fiat currencies and traditional financial interests. Competing digital coins represent a potential end to the governments monopoly of the monetary system." - Bitcoin.com
What are the top risks for Bitcoin holders?
For me, the biggest fear is that bitcoin can be banned or whoever buys the whole bitcoin market and then the bitcoin and my work come to an end, of course today bitcoin is not a payment system, but it's not the worst thing, I think it's fixable in the future. It's scary to stay without capital.