Not so wild as what is the question. Murder rates in cali gold rush boomtowns and cattle towns were astronomically high.

LA mid-1800s at some point was over1k per100k at some point. Pretty small place, sort of a supply town, but still.

Mining camps could see 500 per 100k, quieter boom towns 100 per.

London for reference is now about 1.5k per 100k. Even worst parts of worst cities in the US now wouldn't hit average gold rush levels.

As a gold miner, you'd have likely been very relieved to have been allowed to open a bank account