Hello, I'm 26 this year and have $800-1k per month to invest. I aim to get additional passive income via dividend collection. What should I add to my portfolio?

Based on what you narrate above, it seems like you are just merely following the masses/herd opinion when it comes to your portfolio building.

Think it will be better if you first build up your knowledge & understanding of the various financial products/platforms/asset class before rushing to invest in the next one without a defined role for each investment component towards your over-arching portfolio goals.

Its like a company making a fresh hire with no prior consideration on where to deploy him/her to which department/job scope/task assigment & expect the new hire to perform to unknown mgmt expectations.

In addition, would be prudent to also consider your CPF monies as part of your portfolio as a long-term pseudo bond​​​

If you are looking at dividend collection and want to avoid forex impact and withholding taxes, look at stocks of local incorporated companies.

The dividend yields of QQQ and VTI are pretty low. After the 30% withholding tax on the dividends, they will drop further. I would consider your investments in AutoWealth and kristal.AI as growth components of your portfolio, rather than income components.