Profitability
Profitability of any executed deal may in some times be greater than the return on buying the asset base itself for in this case the profitability is fixed and does not depend on the asset price fluctuations.
Availability
As at working with binary options a trader buys a contract but not an asset base itself, he/she therefore receives a profit from the forecasted price movement and does not fear the sharp price fluctuations.
Own risk management
Prior to buying a contract a trader is aware of a potential payout profit in case of a successful deal and the payout loss if otherwise.