Some big anemones will have shrimp and crabs living together. But they are big anemones (18inch diameter). Bubbletips usually only get to about 10inches diameter and would be ok for a pr of shrimp or a pr of crabs, but probably not for both types of crustacean together. Mind you they aren’t likely to fight, the Periclemines shrimp are very peaceful and porcelain crabs are filter feeders with claws. If they are cheap to buy you could try both species and see how they go. If they are expensive I would just get one species.
Make sure your anemone is at least 6inches in diameter (under normal conditions) before you get the shrimp or crabs. Putting crabs into a small undeveloped anemone can cause the anemone to freak out and wander off.