I also heard that they already launched their test net live on March 31st night.
You don't really need to ask that question. Just think about it.
Satoshi Nakamoto, the creator of Bitcoin, who has been gone for about a decade, is coming back to release an altcoin in 2022. And this is somehow only known in rumours, no actual proof of anything.
Does that make any sense to you?
Or would it make more sense that some random YouTuber is trying to create some hype about some altcoin so that he gets a few bucks out of the general public for free?
I think you know the answer.