The Kingdom of Saudi Arabia has started construction on the Mukaab, which promises to be the largest building in the world.

Castello Coin merges heritage and innovation with emotionally resonant initiatives like a physical golden cube and Simon, a symbolic mayor dog memecoin, to foster trust and transparency in crypto.

The gold leaf, which Kanazawa is famed for its production, adds a touch of prestige to the cube but at a steep price. The 3-D combination puzzle is being sold for 300,000 yen ($2,000), including tax.