Gambling where to remain with profit you need to win always other wise few loosing hands will let you at starting point or under that level once again.
If a "few loosing hands will let you at starting point or under that level once again" you have a horrible bank roll management. All long term successful gamblers have a very good bank roll management. It´s one of the biggest differences between pros and amateurs. Most pros might never risk more than 1% of their bank roll for example.