After reaching my goal of 2.4 on my other main, I am unsure about what to do next. Part of me wants to keep playing, but I am hesitant because I do not want my rating to drop. (It already did a little)
Do you usually stop playing after hitting your target, or do you switch to alts?
Keep playing to keep progressing, and try to get the strategist achievement. You can also play with alternatives to get elite skins, but I recommend that you keep playing with the 2.4 to progress as a player.