Another reason why I see (and I prefer) a dual or trial (or even 4-5 coins ecosystem) as the final winner, instead of a bitcoin monopoly, is also because having 2 or more competing crypto with a widespread use and strong network will force the relative mining industry to find the best organization in the interest of the coin itself. Consider the monopoly situation where bitcoin is the absolute winner. As we know the mining industry has the tendency towards higher level of concentration, which is no good at all for many reasons, till the point when someday they can hold hostage the whole blockchain, and deciding what's best for them, instead of what's best for the coins holders. Having another blockchain like litecoin, or more, as an equal alternative will force the bitcoin mining industry to do what's best for the users, otherwise the latter will switch to the next best alternative. And the other way round of course. Conclusion: having at least 2, or more coins, competing at the same level is the best solution for the whole cryptocurrency system. Theoretically nothing says that only one coin will emerge as the absolute winner. So let's fight and work for a competitive system. It's in the best interest of anyone that trust the cryptocurrency invention as an alternative to the corrupt fiat money system. (I know, the bitcoiners will have their potential almost halved and that's why they spread FUD on all alts).
Litecoin is already number 2, but still has to grow compared to btc. And to grow a lot from here.