I'm going to throw my two cents in here. I probably own about 50-75 different props / effects, but do you think I know how to perform them all to the best of my ability? Nope. I don't have enough time in the day nor do I perform enough paid gigs to use them repeatedly to get them down.
Any time I'm asked to perform I continually go back to what I know works and that is Biddle, Sloppy Triumph, my ACR, Crazy Man's Hand Cuffs, and one or two money effects. I have performed them over a hundred times each for various live audiences.
You really do not need to own a zillion magic effects. It becomes a very expensive hobby quite rapidly.
Many of these guys are correct and know what they are talking about.