Who says that Axie Infinity was the opportunity of the past ? Those who are invest in this game recently are also earning decent money from the game. Although those who joined very early would have got the Axies in really cheap prices as then there was no hype of the game and very few people knew about it. But even if you play the game today, you will be able to make good returns. Still there are many updates planned in the game.
If you join early and play to earn and hold for long time. With the rise of AXS and this game, they would earn decent money as said. I don't think most of gamers who joined early still hold their rewards. They have to sell their AXS and SLP for income and to get their capital back.
AXS has good growth and not only gamers but investors would be happy with profit they have from AXS. The story for SLP is different as it is dumping too deep. Price of SLP looks likely to set up a bottom range and in consolidation time after that we might see a rally of SLP.