You think Nintendo Switch games are a good investment, so I mean titles like Super Mario and Pokémon. Could these Sealed games be worth a lot of money in the next 10-20 years?
N64 yes
Wii switch? Or similar. No. Very unlikely
Rather less very few games increase their value over the years and even then there are certain faulty or only very limitedly produced games.
A PC game for what e.g. The potential would be C&C alarm level red 2. But only the editions that were sold before September 11th. Because on this one can see another picture than on the later sold. On the original you can see the WTC with various holes.
