Here is how Google suggests creating an Android keystore:
keytool -genkey -v -keystore my-release-key.keystore -alias alias_name \
-keyalg RSA -keysize 2048 -validity 10000
While 10000 days may seem like eternity, 27 years could pass quicker than you think, and RSA might still be in use.
If tweaking a command-line argument now has a 0.01% chance of saving my market share in the future, I am willing to do it.
QUESTION: How to make this validity period as long as possible?