$Dogecoin (DOGE.CC)$ Which elder brother can tell me how to buy dogecoin? I'm using this Momo system, why isn't there a buying and selling system, only seeing the market inside.

$American Airlines (AAL.US)$ Dear friends, how do you buy or sell a call or put option for a stock? Please give some guidance, thank you.

$Virgin Galactic (SPCE.US)$ Hurry up, luckily I didn't buy it.

$Farmmi (FAMI.US)$ Quickly withdraw, it didn't even reach 2 yuan three years ago, all stock splits, then raise the price. How much money do you have, hurry up and withdraw, remember.

$AMC Entertainment (AMC.US)$ Everyone, don't invest in this stock, withdraw quickly.

$AMC Entertainment (AMC.US)$ This stocks is hopeless, everyone should not buy it, remember, it has been declining all the way. In the first three months, it went from 36 to 3.6, and then 1 share was converted to 10 shares. This time it's probably going to happen again. After the consolidation, it has been decreasing from over 36 to the current price, a tenfold decline. It's just a scam to take investors' money, even if it drops to 3, don't buy it, remember.

$Super Micro Computer (SMCI.US)$ Have enough to eat, run away quickly.

$Xiaomi Corp. (XIACF.US)$ This stocks, can't see any trading buy or sell, which friend can give some guidance, thank you

$Kaixin Holdings (KXIN.US)$ This stock is expected to have a 1:10 stock split.

$Gol Intelligent Airlines (GOLLQ.US)$
Why can't I see the deal here?