Do you really need to be a citizen in U.S to start investing?

[Jasraj Singh]

I recently talked with a lot of people and they told me i don't really need citizenship to start investing in the U.S?  So I'm wondering is it really possible cause if I invest there I need to live there and I even need to go to the property and check it before buying it or selling it also I need to borrow money from the bank so is it really possible?