1) Two known crypto currencies/ private/public addresses being put together as one physical coin shown above:

Bitcoin public address, denomination printed/stamped on the coin and private address hidden, being at the front of coin, and dogecoin public address printed/stamped on the coin and private address hidden at the back of coin. Hence a dual cryptocurrencies physical coin.

For 1), refer to figure 1 under drawing.

2) Mutilple cryptocurrencies can be put together into one physical coin/object, e.g. 6 cryptocurriencies, details like public, private addresses, name of coin, denominations, can all be done on each side of a cube surface, hence a multicryptocurrencies physical coin.

Note: Single physical crypto currency has been done previously by physical coin makers.