If you are winning at the micro tables, just keep doing what you're doing. Generally, when you move up to the higher stakes tables, the skill level of the players increase as well. Winning at micro does not mean you will do as well at say 5/10. If you are win 2/3 of the time, just keep going til you double your BR, then you can always play with the house money at any stakes table with less of a worry.