Yeah, 16k could have been possible if bitcoin managed to stay above 10k for the September month, it would have been a difficult one for sure but it would have been a bit more possible considering we had hit 12k or so in the recent weeks, however now that we have seen under 8k as well it looks like doubling the current price seems unlikely. Don't get me wrong it is bitcoin, anything could happen tomorrow but looks of it bitcoin is at around 8k levels and even if it does go up it will probably go up to 10k or around not 16k, even on a huge bull run 12k would be possible but 16k seems improbable.
Everyone is free to believe what they want to, if you believe bitcoin will go up that much then go ahead but that doesn't mean that its a bit risky if you put your money where you believe.
Lol and i doubt if the people who are saying they believe bitcoin will move towards 16k would even place their money on btc. Most of the people who make such statements probably don't even hold bitcoins. All air. Same as those people who say bitcoin will drop to depressing lows. I'd rather be realistic with my beliefs and keep my expectations at a minimum level.