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Hmm... nowadays, MCs don't seem like a good investment. They're only good when the hype is up (shortly before release and a few hours after release). Their price tend to stagger down after that.
An example to date is the ever-so-popular nightmare sash. It was well-loved. Hoarded way too much, had an initial pricing over 200k before slowly jumping down to the 100k region and now, sadly, it's around 90k-ish (at this time of post).
If you want a long term investment, MCs are okay, I guess. But aim for the popular ones. I don't think the armor falls into that category. I think you're far off better going for something like Muramasa or Light Spirit as I believe those two are still in the high-priced range until today.
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