If bitcoins died tomorrow i would convert all my bitcoins to litecoins and keep it as it is until and unless the price of bitcoins rise to a very high amount and transact it day by day so that i can have a happy life.and enjoy it to the. Fullest . 
If bitcoins die tommorow, i will convert it to fiat and move on. Look for another cryptocurrency that can replace bitcoins. I know its hard to look for another cryptocurrency that as high with the value of bitcoins but i must move on. This speculation might happen, theres no impossible things in this world so we better get ready so once this happen, at least we already know what to do.It depends on how that will happen about bitcoin if dead. If indeed the bitcoin die due to direct price plummeted to $1 then I think you'll never do it, for sure you'll be a big loss if done so. And I think you would have thought that this is something that will last some time and certainly the price would be high so bitcoin. So all of that also depends on the situation that's going on