I believe in Finland you mostly invest in walls and then whats left is for few angel rounds.

This should correlate with how much the founders net, and buying a house after your exit happens elsewhere too. Also, some of the profits go to the institutional investors and they definitely re-invest.

No by investing in walls I meant that in Finland typically it has been quite common that after successful exit the profits (mainly) go into property development. You start buying different kinds of real estate.

Yes I'm sure there will be a startup rival for Google any day now...

I'm not sure what kind of argument you want to make: Wolt could've been the first GAFAM to come from outside of US? Finland (GDP $271 billion) should grow and host a business such as Google (revenue $183 billion)?

You can be even more happy if you use the money to buy a new yacht.

Even as a country, yes, if the yacht is bought from the local economy and fuels new maritime innovations.