how robust and strong the community thinks the Bitcoin market is since MtGox.
back in 2013ish at the time of Mt Gox, there weren't really any other bitcoin exchanges that mattered. most of them were too small to even be considered. Mt Gox had more than
70-75% of the the total daily trading volume in the whole world!
today at 2017 the daily volume has grown and it is spread among lots of trading platforms. the share of Bitfinex from this market is only less than
8-9%.
also it is worth mentioning that you can still withdraw any cryptocurrency from Bitfinex, as many are withdrawing their bitcoins.
If Bitfinex became like MtGox, what price do you believe Bitcoin will fall to?
if by "became like Mt Gox" you mean insolvency and them closing "all" the withdrawals then yes i believe bitcoin price will fall but it is impossible to tell fall to what.
as i said people have already withdrawn many of their coins from this exchange and then closing down is like closing down 9% of the market! but it is
all about the panic sells and that is unpredictable.
it may be small down to $1100!