I've found when I lock my bike outside that in the morning when I get going my brakes (v-brakes) like to squeal like hell. I took the bike inside and it seems having both the rims and brake pads warm fixed it. It's just going to be a compromise. It won't destroy it; it's a bike. Bikes don't have very many moving parts so it's not a big deal. You just may have to do more maintenance than if you kept it inside.