12.5 XMR/min => 18000 XMR/day
at 0.001 BTC/XMR => 18 BTC/day
compare that with f.e. litecoin: 50 LTC/2.5 min => 28800 LTC/day
at 0.0087 BTC/LTC => 250 BTC/day
what we need is adoption, when adoption comes, the current XMR exchange rate is just ridiculously low.
There are 34,947,351 LTC
28800 LTC/day * 30 days => 864000 new coins each month, or 2.41% new coins in relation to Available Supply LTC
(bleeding like a pig, but a rather small wound if compared to the p's size)18000 XMR/day * 30 days => 540000 new coins each month, or ~10% new coins in relation to Available Supply XMR
So the figure changes oposite down if you take in the different coin ages. Litecoin has more adoption, but no more any innovation power. That kinda suggests XMR/LTC trading pair on exchange sites.
If you are mining LTC, you are most probably locked in due to high hardware investment costs. Mining XMR is adoptable by everyone.
Guesswork: LTC mining will continue but we will see some inpour from this side, buying XMR, stashed away for a later day. That could start once the % dillution values of LTC are equalling XMR. Which Available Supply XMR would mark that day on a calendar? Not so easy to say, one day XMR will have grown out of it's dwarf size of 5325000 coins, but LTC just continues with 50 LTC/2.5 min. There should be some block halving down to 25 LTC/2.5 min somewhere.