Do U mean my 1 coin will become two coins? I am giggling.
In a way, yes. In an unsuccessful hardfork, you will not have two coins on one chain,
but one coin on two viable chains. Both of these two separate chain coins will each
correspond to the same privatekey, that you control.
In the event of a hardfork that is 100% supported, then you will only have one viable coin.
The "two coins" only come about if "two chains" survive.
Learning from ETH, it seems both chain survive as of now? I am wondering, such fork happened in the past, can I have reference?