Yes Bitcoin has so many risks and only one benefit and that is to earn more money by investing or joining bounties or airdrop campaigns. But there is the saying higher the risk higher the profit so still so many people invest in crypto even the risk is high.
One benefit only? You know that Bitcoin have the blokchain technology and many of industry or companies is as inspired to adoption it.
and bitcoin is the main of crypto in the world and Bitcoin is a type of payment in Japan and other. So, Bitcoin is not one benefit.