Buy aapl and nvda or put money in Roth?

give it to me

Hello mate! if I were you I would try to concentrate the most capital in or two positions, that would be my strategy if I wanted to maximize my chances of big profits. my biggest mistake when I started investing ago some years was trying to diversify a lot my portfolio, that applies to bigger capital portfolios. Between these options, I think both Nvidia and Apple have a great future ahead. You could also invest in ETFs. Greetings.

Why don’t you just buy those inside your Roth?

Definitely try to invest it in 1-2 companies in which you have high conviction and have developed a long term fundamental thesis. The skills and experience you'll start to learn from investing this way will be infinitely more valuable than whatever profit you can make on $400.

But you have to put some effort into it. Choosing 2 companies because you kind of like them won't teach you much. Dig deep.