It means you need to be able to interact with other players effectively
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Early 2022 seems the most likely, although The Pokemon Company promises to release more details on the timing of all this soon. The Pokemon Trading Card Game Live app is the full replacement for Pokemon TCG Online, so the good news is that players will be able to transfer almost all of their Pokemon trading cards, details, and progress from Online to Live even the accounts will stay the same, so Online players can simply login to Live with their usual details and everything should carry over immediately, although they may not be able to trade with other players
While not the rarest printing of Pot of Greed, the fact that this specific card is so old means that finding a version of it in good condition is a rarity
Best MTG M21 cards Chandras Incinerator: The gift that keeps on giving Teferi, Master of Time: Its not a phase Grim Tutor: Is this what you were looking for
Each of these has dry-wipe surfaces to allow people to draw their own tokens, give them special abilities and track life totals too