Exactly what the title says.
If bitcoin dropped to the price of a dollar (which we hope it never will), what would you do? Buy more and hold, sell? Buy a promising altcoin like ETH?
I personally would buy more bitcoin.
Move to eth or dash...monero, lisk.. you can choose. I don't think that will happen ever. Bitcoin is growing and that is a fact, people can talk what ever they wish, imagined things will always be around don't believe in everything you hear.
And lets say that we see bitcoin drop so low, do you think it will be slow fall or one fast one (bitcoin is now very high)? If bitcoin fall like that I doubt it can survive that kind of fall. Nothing can.