u/Fun-Spirit-1264

I have like 30k in CAD that I want to invest but I don’t know where. I want to invest in something that just compounds overtime and is safe but I’m also a dual citizen in America and Canada. I currently live in Canada but my plans are to move back to America for post-graduate studies. Any ideas where I can invest and not have to worry about taxing?? Is it better to convert this money to usd? Any help will be much appreciated