While all Pokemon cards are fetching high prices right now, base sets tend to fetch the most money, running as high as $50,000+ for a sealed booster box
Since it relies on having a legendary creature in play to function, Mox amber is more likely to serve as a mana fixer and minor tempo boost in the mid game, rather than provide the explosive starts other Moxen offer
Depending on how fortified you want to be, you might want to add in a Dosan the Falling Leaf (which is handy because it's a creature), or even a City of Solitude
Trophy Example Playing Against It Bats can have a bit of a glass jaw, especially if it finds itself on the draw and/or deploying cards like Starscape Cleric early on
The only concerns are the PC-only initial launch, and how this all plays out with Organized Play and Magic Online