To rob the bank, first you need some dynamite. Collect some, then go to the bank. Go downstairs, knock the guard out but don't kill him. This is to prevent him from respawning. Take your dynamite and place it on the vault door. Blow it up. At this point you should have assault/armed assault and demolition crimes. Take the money in the vault. There should be $10000. Now you have grand larceny. Money respawns in the bank $1000 at a time, but the vault door also eventually respawns. Be careful not to stay in the vault. Now you have money. If you want to be careful, wait for your crimes to run out before leaving. Now you have robbed the bank and can do as you wish with the money.