I would simply trade my coin for gift cards from walmart or target for food.
Trade it for visa gift cards to pay bills.
1. How long could you survice?
2.How long do you think it will take bitcoin to go "mainstream"
I included my top 5 places to buy here.
You're not then surviving off bitcoin alone ar you?
Mainstream adoption is still probably over 20 years off (probably). Very few have the idea of how to use it and many don't know what it is). So currently, the answer is no, you cannot survive off it alone (unless you get a bitcoin debit card or similar that can convert it when you get to a compatible card reader).
-alone meaning not fiat, no cash
i don't know how long i can survive with bitcoin alone without using fiat because as long as bitcoin is only used in internet and we can not use bitcoin in offline life, i think it doesn't need too long to give up. we still need fiat beside of bitcoin because with fiat, we can exchange our bitcoin into fiat and then we can spend our money to buy something.
That's a fairly good point. If the internet connection was interrupted in something like a natural disaster then there would be no way for people to buy stuff (unless they have something like fiat or gold in order to pay them with). Or even if you were without an internet connection for a while.