How safe is our money?
It depends on the type of account. In case of Deposit accounts (CD's, FD's) - A small portion of the money gets stored in the banks safe deposit vaults and the rest is lent out to other customers as...
Yes you can. There are no federal laws against it.
A bank account, savings account, or family trust fund are a few options, it depends what you mean when you say 'in'.
Somewhere where you'll remember where you put it!!