Projection of ladders stars

I'm Legend in Standard,

but only Bronze 1 in Wild. 

My usual rank in Wild is Diamond 5+, but in June I was only something like Platinum 8 and this month I played only 3 or 4 games.

Do you think I will lose a star this month?

For some reason I'm bored playing Wild, but there are 3-4 days left and maybe I can force myself playing it a bit to stop MMR decay. Is MMR decay a thing? Do I need to just win a bunch of games, or reach Diamond 5 to keep 10 stars bonus? Well, even if I lose a star, next time more effort will be needed to reach Diamond 5, but streaks still work there (unlike later).

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I heard you are matched according to MMR all the way to your class (1 star), after that you're not matched by MMR, but by class/rank. It's noticeable, because, e.g. my climb from 5 to Legend was easier, because people played worse and worse decks.

MMR decay is, if it exists, pretty slim. I think it’s worse for your MMR to meme the whole month. 
But actually I don’t know anything and was surprised multiple times by the new ladder system.

Last month, I got 11 stars and didn’t take the climb serious at all (winrate pretty close to 50% maybe even below with shaman, paladin, deathrattle rogue or elemental mage). I still ranked at Rank +-1000 a couple days ago when I reached legend. 

Long story short, it’s kinda hard to fool them on your MMR these days. 

Oh and talking about curiosities.... I had incredibly long queue times on diamond ranks (sometimes over 2 minutes). All went back to normal once I reached legend

Yeah, when you sometimes can lose more by playing than not, tells us how strange and complicated is the new system. :P

I also heard if e.g. rank 2 player faces a Legend, it's only because he was 11 stars sometimes before. If you are rank 2, but 10 stars previously, you can't face legend players, but pre rank 5, 10 stars players can! ...Just hearing those rumors. 

Anyway, thanks for the reply. I'll see tomorrow will I find some energy to play couple of Wild games.

I retained 10* stars for Wild. Ended as Platinum 10.

But, oh boy, was I surprised after receiving 11* stars reward for Standard ladder!!!

Last month my Standard stats: 110 games. 60% win-rate. Rank - 3062. https://ibb.co/6D3zRyW

Decks: Various, but mostly Pure Paladin and Gala Shaman. Some Dragon Hunter, Pirate Warrior...

I have no idea why my reward jumped to 11*. I don't play that much anymore. My last Legend was in May (got 10*), so no Legend in June for me. Rumors are telling one need to be top-1500 to get 11*?!?

Am I that good, lol?! Or I maintain a good MMR by not playing much or vs. worse players and not vs. top legends, but then... I'm certainly better then my current opponents and current rank? Skill level feels a lot worse than before. Only really top legends know how to play this game and I think they are the most screwed by this new MMR system.