The biggest risk of using Bitcoin is it's price. It's price is unpredictable anyone can't guess the future price of bitcoin it will lose or dump you can lose and earn from it but it is risky.
Not just Bitcoin, it is difficult to predict the future price of any virtual currency. However, the future of Bitcoin depends on the investor presence in the market. If the government of a country renews bitcoin Only then does the market change. Moreover, there is no other risk in investing in Bitcoin.
There's no need for any country to renew bitcoin or what. And despite the future is unknown for bitcoin, the majority including me look at it as an exciting future because the fact is that it's here to stay. With such market capitalization and demand, if the crypto market deteriorates then for sure that bitcoin shall stand last. And you're wrong about the risk, despite being the market leader, there will always be the risk in investing in bitcoin and that's what everyone mostly the newbies have to look before investing.