This is VERY wide range and I am totally aware of such. I am reading multiple waves and first most conservative target is near 500 mark by end of next month ? That sound crazy but who knows what is ahead of us.
I would not like 500 by next month end as it will be a sudden death, a more gradual approach towards 500 by end of 2018 is preferable.
1500 is not an impossible target and something tells me that *eventually* Bitcoin and Litecoin will be near par in terms of market cap. This means $1500 by end of 2019 is totally doable while Bitcoin suffer from network congestion.