Only if you can anticipate that the value of the metal is still there in 100 years, or that the coins will be worth something as a collector's piece.

Imagine if these were aluminum, which was expensive in the 1870s...

(http://www.tms.org/pubs/journals/JOM/9511/Binczewski-9511.ht...)

This is a time-honoured tradition.

The dirt in england is awash with buried hoards, where people buried their currency and valuables to hide them from the government. The list is fascinating.

Which is exactly what some fool thought 100 years ago when they buried and lost these coins.