I think it depends on the action at the table and in the hand. With more callers you may want to 3 bet to reduce the field, but you risk the callers of your three bet will have strong hands that you may have to fold to if they hit and you miss. If you call or raise to 3-4 bigs, you will reduce the field and not lose too much if they hit and you don't feel a call or raise is right and if they miss or are weak bets to you, you can a lot of times take down the pot with a healthy raise. As you can imagine there are a lot of variations to this depending on the aggression of your opponents, your hand and how many players are in the hand.
Usually it's tightish at the beginning and loose at the mid-late stage. For example in late stage:all suited Aces, ATo+,34s+,J9o+, all broadways, all pocket pairs, suited connectors like 76s,89s, gaps 96s,75s etc. Around 30-35% in late stages. In late stage you can wider your range by adding all Ax hands,suited hands with 1 high card like Q2s,J2s etc, all playable hands like T8o,J8o etc. Also, take a look to the blinds. If they likes to see a flop and call your Cbet a lot then maybe it's better to not open junk hands and tighten up against them if you not feeling good at postflop
Since you said 100b I'm guessing you're talking about cash games. But 6-max or full ring? If it's 6-max the ranges would be wider since you have less opponents who are able to come up with a better hand.