Thoughts on my portfolio

CSP1(S&P)- 25%
CNX1(Nasdaq)- 25%
SWDA(all world)- 20%
GOOGL- 5%
MSFT- 5%
AAPL- 5%
AMZN- 5%
BRKB- 5%
NVDA- 5%

I know there’s a lot of overlap with my etfs and individual holding, but I like having the individual holding. I might add one more individual stock, any thoughts on what to change/add? I’m thinking of adding BLK?