Great point @captaincanary.
I didnt consider the higher $ amounts listed (although they are the same reward system as always since that is figured out in steem and sbd). I might have to add that to a post...
I believe the move from $250B to $420B in a couple weeks is simply because we are seeing the power of Wall Street starting to emerge. That is the only entity that I know that can move things up that quickly. For that reason, I think buyers for all of the top 40 or 50 coins will come out in droves. BTC will still receive a fair bit of that money since it has the name but the spillover will end up in other tokens.