200 amp panel. I thought about wiring a sub panel into my garage, but I already have the 30 amp breaker. What would I gain from wiring in the sub panel? I currently only have a roughly 1200 watt miner and a 900 watt running. The rest is for future.
It's called future-proofing. If you don't feel the need to, then don't. I would still consider upsizing the wire that you run.