Furthermore, good luck finding a place to invest in the first place. If looking for a US company, the likes of Vanguard and Charles Stanley will freeze your account if they find you reside outside the US. In the UK, I've gotten very used to seeing the text 'we are unable to open accounts for US, Cuban, Iran, Sudan, Syria, and North Korea persons'.
I make well below the standard deduction and just want to save a bit for my future. The US laws as they stand make this very difficult.