Both will probably be non-existent in a few years. If by some chance Monero survives it will find its use as a privacy-centric currency / store of value, not as an investment vehicle. The non-fixed emission (to maintain mining incentives ad infinitum) means that it will never have the same scarcity as Bitcoin, but I think it's already been demonstrated that scarcity in altcoin distribution is wholly overrated.
Fluffy, what do you mean Monero will probably be non-existent in a few years? What makes you say that?
Lack of consumer adoption will be the downfall of many of the altcoin projects. It's critical to understand the paramount importance of brand name.
There is a fickle nature to the consumer, and picking the winners can be tough. It could be Monero or it could be BananaCoin.