By 2021 I predict big companies like Steam, eBay or even Amazon starting to accept Bitcoin payments through a much more robust and user friendly LN. Coupled with the store of value properties which will remain as solid as always, the combination will make the price go beyond $100,000.
Hard to time it, but three years is definitely possible. The supply is so limited and blow-off tops are so unpredictable that tagging $100,000 was possible this year (though clearly won't happen now). But that's the thing about hype cycles. Fundamentals aren't very important during strong trending markets.
Anyway, I think Bitcoin's headed there regardless of Lightning.
I wish you are right - but that scenario is overly optimistic. Steam used to accept Bitcoin and that option has been removed some time ago.
There is no telling if Gabe will be eager to accept Bitcoin again anytime soon, if ever.
Caring about merchant adoption? What is this, 2014?! If people are adopting BTC as a store-of-value (rather than a micropayment rail) then we don't need Steam et al.