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.
Thanks you very much for your extensive explanation.
What do you mean with scarcity? I thought Monero has got a maximal total amout of around 22 mln coins.
Slowly decreasing block reward reaching approx 18.4 million XMR in 8 years,[1] and then a "tail emission" creates a constant increase in money supply amounting to 157,788 XMR per year (mining incentive). This corresponds to an inflation rate of 0.87% around the year 2022, monotonically decreasing towards 0% asymptotically.