A sock full of quarters is a cost effective weapon that can do some pretty good damage if used correctly. 10 dollars worth of quarters probably more than enough. You don’t want to get too many, or you are going to lose a lot of mobility. Your strikes may be more lethal, but you won’t be able to strike as often and cause more damage.
Tip: use a duckworth sock. Its a little heavier, but its also made of a stronger material. There is nothing worse than getting a hole in quarter sock right while you’re in the middle of attacking someone. Duckworth socks are also American made, so you can beat a guy’s ass while still supporting local.
When was the last time you were attacked by a man with a sock full of quarters?