High net worth individuals are more likely to be targeted by cyber attacks for the same reasons that bigger businesses are more likely to be targeted. The greater the prestige of the target, the greater the rewards of a successful attack - not only in terms of monetary gain, but for their higher status as well.
Unlike businesses, for whom theft of sensitive information and loss of profits are the greatest concerns, cyber crimes committed against individuals can be a lot more sinister. If cyber criminals hack into a home network, they may be able to see through webcams, speak through audio devices, and even unlock doors.
Cyber crimes committed against individuals can be used to blackmail and threaten them and their family. Individuals are often targeted persistently until the hackers get what they want, and if they fail to implement appropriate security solutions, they will continue to be left exposed.