Wave is the strongest and most powerful natural force on earth. It has been a disaster for some sailors and savior for some. Getting a wave tattoo done symbolizes riding these waves and making the most out of it.
The Wave is symbolized as one of the strongest forces on earth. so strength for one. also if you read more into it, its about faith, a wave is you against mother nature, you cannot control it, you just have to put your faith into her.