Hi everyone, i'm somewhat new here so please bear with me

First off, i'm not a crypto expert by any means, just a casual fan.
I've been interested in cannabis, as a hobby and a business, for a while but unfortunately the laws of my country (italy) don't allow much.
Recently a local company/start-up (Nativa) has partnered with an alt-coin (WIID) and that sparked my interest in that combination, which I had initially written off, and found other cryptos targeting marijuana (like PotCoin, Tokes and others).
I have invested in a really small amount on WIID because of initial excitement, and now i'm wondering wheter or not this particular market has any merit to exist or not before I go any further, regardless of which crypto establishes itself.
What do you guys think?
I don't understand the advantages of specific coins for cannabis only. I think there should be one general currency being used and blockchain would be applied to cannabis platforms, that would make more sense to me.