I would speculate there are some dealer-sellers easily clearing multiple six-figures per month selling high-end slabs (graded cards) or collections given the current climate
2 Deck boxes
This winter I bought both English and Japanese foils close to $100 USD in Europe and flipped all of them for $200+ and though I was happy with the extent and speed of the returns, I suspect that the buyers may get a similarly attractive exit if they are more patient than I was
Many of the cards in Paradox Rift are seeing significant play in tournaments and more competitive, rather than casual, play right now
However, since the value of these decks is significantly above MSRP, just having the new cards decrease in price won't be enough, so we'll likely see a big decline from most of the reprints (especially those that aren't top 100 Commander cards) as well
You're going to want to make sure you're getting your mana rocks ASAP when you're playing, so you can be absolutely certain your turns 3-5 are spent casting absolutely massive spells several turns ahead of your opponents