Hi, i hope you have a great time playing splinterlands and achieve your goals!
and that your investments will be profitable.
The rewards you'll get in higher leagues do seem juicy, but you have to remember that the people in higher leagues do hold onto a higher value aswell. So in the end their ROI on playing might be the same or similar to playing in lower leagues, i think.
at the moment it is indeed quite hard for new players to get in without renting a deck, which is why chaos legion's release is being so highly anticipated!
As for speculating on the right assets, all splinterlands assets are pretty popular at the moment 😁
Don't put all your eggs in one basket though.
Good luck, and have fun!