The part about things like this, is it's not always upwards. I quit playing Splinterlands once for various reasons but that's when things were just getting started. Had I known things would be worth what they are today, I wouldn't have quit but that's the thing with life. Things happen and we don't know what comes and goes but participating is good to do at least.
Keep up the work in the game and you can potentially have an opportunity in the future to take advantage of these investments. It's a lot on the Splinterlands team but they've been quite creative so far on keeping interest in the game. I think in a few weeks, once the general sale is underway or over (depending on how fast things sell out lol) I think the team will release another good announcement that will drive more investment into it.
One thing I made sure to do is take profits when I could, so you have hope to get to that place I think!
Milestones can be tricky sometimes. They can make you overextend in a not ideal moment. Like getting to a certain amount of vouchers dropped, a certain amount of DEC from rentals, or...a certain level of collection power so that you could earn on higher leagues. I think I got all three kinds of overextending incentives.