Jiu Jitsu Times has an article on how many techniques you should know: my general opinion is you should be at the very least familiar with as many as possible, but it doesn’t mean that you should attempt to incorporate every technique into your game. What do you NEED to know? I would think you should have at the very least one go-to move in each major guard position: open, closed, half, butterfly, etc. in top and bottom so you aren’t just stuck in a position wondering what the heck you should do now. But, that’s just my opinion, feel free to disagree.
Check out the article and let me know what you think- otherwise, have a great day everyone!