Storing your single seed phrase on a piece of paper with tape a 3-hour train ride away is frankly not the best advice. Stamping your 2 of 4 multi-sig seed phrases on steel and storing each of them in four separate secure locations is a better plan. You want your high value HODL wallet that you plan to save for years to be difficult to reach but extremely secure to everyone including yourself. You can secure the 4 seeds in different cities, different countries, even different continents.