We quickly came to the conclusion that it would be best to invest it in an office building, of course one that is fully-leased to tenants of stable financial standing. Just as we were saying this, the news came through of the sale of the Focus Filtrowa office building in Warsaw for EUR 117 mln, or around PLN 0.5 bln - a piffling sum, really. So our dreams were shattered. If not an office property, then perhaps an apartment block? Such a purchase could also turn out to be rather costly. And whether it would provide a suitable return on the investment is another story.The media has recently reported that the most expensive apartment in the world is to be built in Monaco. Its price? A mere snip at USD 280 mln, or more than PLN 880 mln. The apartment is expensive but also quite large, huge even, as it will have an area of 3,000 sqm. The price per sqm is over PLN 293,000. This means that the lottery winnings would only allow us to afford about 100 sqm of it. The penthouse is to be located i