Actually, I collected stamps and coins/banknotes since ten years old. I thought philately will disappear in later 1990s, when internet emerged as common way for communication. But I found thing is not so simple. In recent 2 years, I suddenly found many younger people born in 1990s was enthusiastic about postcard exchange, and the hobby around stamps re-emerged so quickly, later I found it is post-crossing. Some country even issue stamps to commemorate it.
It is a miracle.Really.
For me, I would like to receive postcards with commemorative stamps. The postcard would be better with the local scenery, especially ancient sites. Write in your local language of greetings.