Which is harder to get in to? A top tier investment bank (top 5 let's say) (to work as an investment banker, not as a trader), or a trading firm such as DRW Trading Group, Susquehanna, Group One, Peak6, Ronin Capital, Spot Trading, etc.? Also, please list any information that you have about any of the above trading firms- especially compensation figures for how you move up the ladder from trader trainee to 5-10 year experienced trader.