Hey, ya all Vangas here ;p
BTC won't be anywhere near 7.5k USD! It's purely insane. Governments won't allow it in any form and will actively prohibit. So long it is on 'fan level' they don't really care. Read news about China and their BTC exchanges drama.
And I don't see Litecoin doing that great either!
One of a few reasons 1 BTC could hit ~7.5k USD is US dollar depreciation to toilet paper, which is more likely due to US debt crawling to 70% of GDP.
Eth, Dash, Zec and few others plus some strong 'alt-newcomers' seem to prosper for me in the years to come (2017-2019).