Keep in mind too that playing deep is different than playing with 100 bbs. Not when you're playing some form of limit poker, but it applies to no limit.
If you and your opponent are deep, your potential implied odds
increase, meaning that you can play much more speculative hands hoping for those few times that you flop big and your opponent is willing to stack off.
The other thing to try to be aware of his how and if your mindset shifts when you are ahead. Do you try to bully? Do you get overconfident? Or maybe you've just played too long and need to take a break.
If none of those thing apply and you know how to adjust to playing deep, then there's no reason not to keep playing. Unless the negative effect of losing your winnings is going to affect your future sessions.