If you compare with other coins, it seems to me that the future of bitcoin is the most promising. Even if we assume that the crisis in the crypto-currency market will be longer than everyone expected bitcoin will remain a coin with the greatest confidence so capital can move from altcoins to bitcoin and this will make it the most tenacious.
Its because bitcoin is the first decentralized digital currency, all coins are created based on bitcoin, so bitcoin is the most potential coin. The future of bitcoin is not known by anyone, but as what i see, the technology now is upgrading fast, so maybe the future of bitcoin is bright or maybe not, because its possible that someone might create better coins than bitcoin.