30, moving around a lot for work, should my portfolio just stay ultra simple?

I relocate every couple of years and my life already has enough admin in it. Age 30, goal is long-term investing with maybe an early pivot to lower-stress work. Risk tolerance medium-high.

Current split:
- 80% world equity ETF
- 10% bond ETF
- 10% cash

I keep thinking I should add small caps, value, maybe a little gold, maybe this maybe that. Then I remember I can barely keep my kitchen utensils in one country-sized box. Simplicity seems underrated?